No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy

Purpose The human pathophysiology of stunned, hibernating and scarred myocardium in ischemic cardiomyopathy is a subject of controversy. While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other t...
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Autor*in:	Benz, Dominik C. [verfasserIn] von Dahlen, Anita P. Huang, Wenjie Messerli, Michael von Felten, Elia Benetos, Georgios Giannopoulos, Andreas A. Fuchs, Tobias A. Gräni, Christoph Gebhard, Catherine Pazhenkottil, Aju P. Gaemperli, Oliver Kaufmann, Philipp A. Buechel, Ronny R.

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2019

Schlagwörter:	Stunning Hibernating myocardium Myocardial blood flow Myocardial flow reserve Viability testing

Anmerkung:	© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Übergeordnetes Werk:	Enthalten in: European journal of nuclear medicine and molecular imaging - Heidelberg [u.a.] : Springer-Verl., 2002, 46(2019), 11 vom: 29. Juli, Seite 2322-2328
Übergeordnetes Werk:	volume:46 ; year:2019 ; number:11 ; day:29 ; month:07 ; pages:2322-2328

Links:	Volltext

DOI / URN:	10.1007/s00259-019-04440-2

Katalog-ID:	SPR003167437

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100	1		\|a Benz, Dominik C. \|e verfasserin \|4 aut
245	1	0	\|a No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy
264		1	\|c 2019
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520			\|a Purpose The human pathophysiology of stunned, hibernating and scarred myocardium in ischemic cardiomyopathy is a subject of controversy. While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other theories suggest that a reduced myocardial flow reserve (MFR) may be the cause. Methods We included 110 patients with ischemic cardiomyopathy. Based on quantitative myocardial perfusion assessment and viability imaging with 13N-NH3 and 18F-FDG positron emission tomography, respectively, as well as wall motion assessment from echocardiography, myocardial tissue was characterized as remote (i.e., normal myocardium), stunned (i.e., dysfunctional but viable myocardium with normal rest perfusion), hibernating (i.e., dysfunctional but viable myocardium with impaired rest perfusion), or scarred myocardium (i.e., non-viable myocardium). Results Compared to remote myocardium, dysfunctional but viable myocardium (including stunned and hibernating) had reduced rest MBF (0.89 mL/min/g vs. 0.79 and 0.76 mL/min/g, respectively; p < 0.001) and MFR (1.53 vs. 1.27 and 1.17; p < 0.001). Between stunned and hibernating myocardium, however, rest MBF and MFR did not differ (p = 0.40). In scarred myocardium, rest MBF was lowest (0.66 mL/min/g; p < 0.001) but, in contrast to the other myocardial states, k2 (i.e., tracer washout) was increased (0.199/min vs. 0.178/min to 0.181/min; all p < 0.05 in pairwise comparison). Conclusions In patients with ischemic cardiomyopathy, impaired MFR is associated with stunning and hibernation. These states of dysfunctional but viable myocardium have lower rest MBF compared to remote myocardium. At the end of the continuum, rest MBF is lowest in scar tissue and linked to increased rate of tracer washout.
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700	1		\|a Pazhenkottil, Aju P. \|4 aut
700	1		\|a Gaemperli, Oliver \|4 aut
700	1		\|a Kaufmann, Philipp A. \|4 aut
700	1		\|a Buechel, Ronny R. \|4 aut
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publishDate	2019
allfields	10.1007/s00259-019-04440-2 doi (DE-627)SPR003167437 (SPR)s00259-019-04440-2-e DE-627 ger DE-627 rakwb eng Benz, Dominik C. verfasserin aut No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2019 Purpose The human pathophysiology of stunned, hibernating and scarred myocardium in ischemic cardiomyopathy is a subject of controversy. While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other theories suggest that a reduced myocardial flow reserve (MFR) may be the cause. Methods We included 110 patients with ischemic cardiomyopathy. Based on quantitative myocardial perfusion assessment and viability imaging with 13N-NH3 and 18F-FDG positron emission tomography, respectively, as well as wall motion assessment from echocardiography, myocardial tissue was characterized as remote (i.e., normal myocardium), stunned (i.e., dysfunctional but viable myocardium with normal rest perfusion), hibernating (i.e., dysfunctional but viable myocardium with impaired rest perfusion), or scarred myocardium (i.e., non-viable myocardium). Results Compared to remote myocardium, dysfunctional but viable myocardium (including stunned and hibernating) had reduced rest MBF (0.89 mL/min/g vs. 0.79 and 0.76 mL/min/g, respectively; p < 0.001) and MFR (1.53 vs. 1.27 and 1.17; p < 0.001). Between stunned and hibernating myocardium, however, rest MBF and MFR did not differ (p = 0.40). In scarred myocardium, rest MBF was lowest (0.66 mL/min/g; p < 0.001) but, in contrast to the other myocardial states, k2 (i.e., tracer washout) was increased (0.199/min vs. 0.178/min to 0.181/min; all p < 0.05 in pairwise comparison). Conclusions In patients with ischemic cardiomyopathy, impaired MFR is associated with stunning and hibernation. These states of dysfunctional but viable myocardium have lower rest MBF compared to remote myocardium. At the end of the continuum, rest MBF is lowest in scar tissue and linked to increased rate of tracer washout. Stunning (dpeaa)DE-He213 Hibernating myocardium (dpeaa)DE-He213 Myocardial blood flow (dpeaa)DE-He213 Myocardial flow reserve (dpeaa)DE-He213 Viability testing (dpeaa)DE-He213 von Dahlen, Anita P. aut Huang, Wenjie aut Messerli, Michael aut von Felten, Elia aut Benetos, Georgios aut Giannopoulos, Andreas A. aut Fuchs, Tobias A. aut Gräni, Christoph aut Gebhard, Catherine aut Pazhenkottil, Aju P. aut Gaemperli, Oliver aut Kaufmann, Philipp A. aut Buechel, Ronny R. aut Enthalten in European journal of nuclear medicine and molecular imaging Heidelberg [u.a.] : Springer-Verl., 2002 46(2019), 11 vom: 29. Juli, Seite 2322-2328 (DE-627)359787258 (DE-600)2098375-X 1619-7089 nnns volume:46 year:2019 number:11 day:29 month:07 pages:2322-2328 https://dx.doi.org/10.1007/s00259-019-04440-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 46 2019 11 29 07 2322-2328
spelling	10.1007/s00259-019-04440-2 doi (DE-627)SPR003167437 (SPR)s00259-019-04440-2-e DE-627 ger DE-627 rakwb eng Benz, Dominik C. verfasserin aut No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2019 Purpose The human pathophysiology of stunned, hibernating and scarred myocardium in ischemic cardiomyopathy is a subject of controversy. While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other theories suggest that a reduced myocardial flow reserve (MFR) may be the cause. Methods We included 110 patients with ischemic cardiomyopathy. Based on quantitative myocardial perfusion assessment and viability imaging with 13N-NH3 and 18F-FDG positron emission tomography, respectively, as well as wall motion assessment from echocardiography, myocardial tissue was characterized as remote (i.e., normal myocardium), stunned (i.e., dysfunctional but viable myocardium with normal rest perfusion), hibernating (i.e., dysfunctional but viable myocardium with impaired rest perfusion), or scarred myocardium (i.e., non-viable myocardium). Results Compared to remote myocardium, dysfunctional but viable myocardium (including stunned and hibernating) had reduced rest MBF (0.89 mL/min/g vs. 0.79 and 0.76 mL/min/g, respectively; p < 0.001) and MFR (1.53 vs. 1.27 and 1.17; p < 0.001). Between stunned and hibernating myocardium, however, rest MBF and MFR did not differ (p = 0.40). In scarred myocardium, rest MBF was lowest (0.66 mL/min/g; p < 0.001) but, in contrast to the other myocardial states, k2 (i.e., tracer washout) was increased (0.199/min vs. 0.178/min to 0.181/min; all p < 0.05 in pairwise comparison). Conclusions In patients with ischemic cardiomyopathy, impaired MFR is associated with stunning and hibernation. These states of dysfunctional but viable myocardium have lower rest MBF compared to remote myocardium. At the end of the continuum, rest MBF is lowest in scar tissue and linked to increased rate of tracer washout. Stunning (dpeaa)DE-He213 Hibernating myocardium (dpeaa)DE-He213 Myocardial blood flow (dpeaa)DE-He213 Myocardial flow reserve (dpeaa)DE-He213 Viability testing (dpeaa)DE-He213 von Dahlen, Anita P. aut Huang, Wenjie aut Messerli, Michael aut von Felten, Elia aut Benetos, Georgios aut Giannopoulos, Andreas A. aut Fuchs, Tobias A. aut Gräni, Christoph aut Gebhard, Catherine aut Pazhenkottil, Aju P. aut Gaemperli, Oliver aut Kaufmann, Philipp A. aut Buechel, Ronny R. aut Enthalten in European journal of nuclear medicine and molecular imaging Heidelberg [u.a.] : Springer-Verl., 2002 46(2019), 11 vom: 29. Juli, Seite 2322-2328 (DE-627)359787258 (DE-600)2098375-X 1619-7089 nnns volume:46 year:2019 number:11 day:29 month:07 pages:2322-2328 https://dx.doi.org/10.1007/s00259-019-04440-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 46 2019 11 29 07 2322-2328
allfields_unstemmed	10.1007/s00259-019-04440-2 doi (DE-627)SPR003167437 (SPR)s00259-019-04440-2-e DE-627 ger DE-627 rakwb eng Benz, Dominik C. verfasserin aut No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2019 Purpose The human pathophysiology of stunned, hibernating and scarred myocardium in ischemic cardiomyopathy is a subject of controversy. While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other theories suggest that a reduced myocardial flow reserve (MFR) may be the cause. Methods We included 110 patients with ischemic cardiomyopathy. Based on quantitative myocardial perfusion assessment and viability imaging with 13N-NH3 and 18F-FDG positron emission tomography, respectively, as well as wall motion assessment from echocardiography, myocardial tissue was characterized as remote (i.e., normal myocardium), stunned (i.e., dysfunctional but viable myocardium with normal rest perfusion), hibernating (i.e., dysfunctional but viable myocardium with impaired rest perfusion), or scarred myocardium (i.e., non-viable myocardium). Results Compared to remote myocardium, dysfunctional but viable myocardium (including stunned and hibernating) had reduced rest MBF (0.89 mL/min/g vs. 0.79 and 0.76 mL/min/g, respectively; p < 0.001) and MFR (1.53 vs. 1.27 and 1.17; p < 0.001). Between stunned and hibernating myocardium, however, rest MBF and MFR did not differ (p = 0.40). In scarred myocardium, rest MBF was lowest (0.66 mL/min/g; p < 0.001) but, in contrast to the other myocardial states, k2 (i.e., tracer washout) was increased (0.199/min vs. 0.178/min to 0.181/min; all p < 0.05 in pairwise comparison). Conclusions In patients with ischemic cardiomyopathy, impaired MFR is associated with stunning and hibernation. These states of dysfunctional but viable myocardium have lower rest MBF compared to remote myocardium. At the end of the continuum, rest MBF is lowest in scar tissue and linked to increased rate of tracer washout. Stunning (dpeaa)DE-He213 Hibernating myocardium (dpeaa)DE-He213 Myocardial blood flow (dpeaa)DE-He213 Myocardial flow reserve (dpeaa)DE-He213 Viability testing (dpeaa)DE-He213 von Dahlen, Anita P. aut Huang, Wenjie aut Messerli, Michael aut von Felten, Elia aut Benetos, Georgios aut Giannopoulos, Andreas A. aut Fuchs, Tobias A. aut Gräni, Christoph aut Gebhard, Catherine aut Pazhenkottil, Aju P. aut Gaemperli, Oliver aut Kaufmann, Philipp A. aut Buechel, Ronny R. aut Enthalten in European journal of nuclear medicine and molecular imaging Heidelberg [u.a.] : Springer-Verl., 2002 46(2019), 11 vom: 29. Juli, Seite 2322-2328 (DE-627)359787258 (DE-600)2098375-X 1619-7089 nnns volume:46 year:2019 number:11 day:29 month:07 pages:2322-2328 https://dx.doi.org/10.1007/s00259-019-04440-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 46 2019 11 29 07 2322-2328
allfieldsGer	10.1007/s00259-019-04440-2 doi (DE-627)SPR003167437 (SPR)s00259-019-04440-2-e DE-627 ger DE-627 rakwb eng Benz, Dominik C. verfasserin aut No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2019 Purpose The human pathophysiology of stunned, hibernating and scarred myocardium in ischemic cardiomyopathy is a subject of controversy. While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other theories suggest that a reduced myocardial flow reserve (MFR) may be the cause. Methods We included 110 patients with ischemic cardiomyopathy. Based on quantitative myocardial perfusion assessment and viability imaging with 13N-NH3 and 18F-FDG positron emission tomography, respectively, as well as wall motion assessment from echocardiography, myocardial tissue was characterized as remote (i.e., normal myocardium), stunned (i.e., dysfunctional but viable myocardium with normal rest perfusion), hibernating (i.e., dysfunctional but viable myocardium with impaired rest perfusion), or scarred myocardium (i.e., non-viable myocardium). Results Compared to remote myocardium, dysfunctional but viable myocardium (including stunned and hibernating) had reduced rest MBF (0.89 mL/min/g vs. 0.79 and 0.76 mL/min/g, respectively; p < 0.001) and MFR (1.53 vs. 1.27 and 1.17; p < 0.001). Between stunned and hibernating myocardium, however, rest MBF and MFR did not differ (p = 0.40). In scarred myocardium, rest MBF was lowest (0.66 mL/min/g; p < 0.001) but, in contrast to the other myocardial states, k2 (i.e., tracer washout) was increased (0.199/min vs. 0.178/min to 0.181/min; all p < 0.05 in pairwise comparison). Conclusions In patients with ischemic cardiomyopathy, impaired MFR is associated with stunning and hibernation. These states of dysfunctional but viable myocardium have lower rest MBF compared to remote myocardium. At the end of the continuum, rest MBF is lowest in scar tissue and linked to increased rate of tracer washout. Stunning (dpeaa)DE-He213 Hibernating myocardium (dpeaa)DE-He213 Myocardial blood flow (dpeaa)DE-He213 Myocardial flow reserve (dpeaa)DE-He213 Viability testing (dpeaa)DE-He213 von Dahlen, Anita P. aut Huang, Wenjie aut Messerli, Michael aut von Felten, Elia aut Benetos, Georgios aut Giannopoulos, Andreas A. aut Fuchs, Tobias A. aut Gräni, Christoph aut Gebhard, Catherine aut Pazhenkottil, Aju P. aut Gaemperli, Oliver aut Kaufmann, Philipp A. aut Buechel, Ronny R. aut Enthalten in European journal of nuclear medicine and molecular imaging Heidelberg [u.a.] : Springer-Verl., 2002 46(2019), 11 vom: 29. Juli, Seite 2322-2328 (DE-627)359787258 (DE-600)2098375-X 1619-7089 nnns volume:46 year:2019 number:11 day:29 month:07 pages:2322-2328 https://dx.doi.org/10.1007/s00259-019-04440-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 46 2019 11 29 07 2322-2328
allfieldsSound	10.1007/s00259-019-04440-2 doi (DE-627)SPR003167437 (SPR)s00259-019-04440-2-e DE-627 ger DE-627 rakwb eng Benz, Dominik C. verfasserin aut No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy 2019 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2019 Purpose The human pathophysiology of stunned, hibernating and scarred myocardium in ischemic cardiomyopathy is a subject of controversy. While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other theories suggest that a reduced myocardial flow reserve (MFR) may be the cause. Methods We included 110 patients with ischemic cardiomyopathy. Based on quantitative myocardial perfusion assessment and viability imaging with 13N-NH3 and 18F-FDG positron emission tomography, respectively, as well as wall motion assessment from echocardiography, myocardial tissue was characterized as remote (i.e., normal myocardium), stunned (i.e., dysfunctional but viable myocardium with normal rest perfusion), hibernating (i.e., dysfunctional but viable myocardium with impaired rest perfusion), or scarred myocardium (i.e., non-viable myocardium). Results Compared to remote myocardium, dysfunctional but viable myocardium (including stunned and hibernating) had reduced rest MBF (0.89 mL/min/g vs. 0.79 and 0.76 mL/min/g, respectively; p < 0.001) and MFR (1.53 vs. 1.27 and 1.17; p < 0.001). Between stunned and hibernating myocardium, however, rest MBF and MFR did not differ (p = 0.40). In scarred myocardium, rest MBF was lowest (0.66 mL/min/g; p < 0.001) but, in contrast to the other myocardial states, k2 (i.e., tracer washout) was increased (0.199/min vs. 0.178/min to 0.181/min; all p < 0.05 in pairwise comparison). Conclusions In patients with ischemic cardiomyopathy, impaired MFR is associated with stunning and hibernation. These states of dysfunctional but viable myocardium have lower rest MBF compared to remote myocardium. At the end of the continuum, rest MBF is lowest in scar tissue and linked to increased rate of tracer washout. Stunning (dpeaa)DE-He213 Hibernating myocardium (dpeaa)DE-He213 Myocardial blood flow (dpeaa)DE-He213 Myocardial flow reserve (dpeaa)DE-He213 Viability testing (dpeaa)DE-He213 von Dahlen, Anita P. aut Huang, Wenjie aut Messerli, Michael aut von Felten, Elia aut Benetos, Georgios aut Giannopoulos, Andreas A. aut Fuchs, Tobias A. aut Gräni, Christoph aut Gebhard, Catherine aut Pazhenkottil, Aju P. aut Gaemperli, Oliver aut Kaufmann, Philipp A. aut Buechel, Ronny R. aut Enthalten in European journal of nuclear medicine and molecular imaging Heidelberg [u.a.] : Springer-Verl., 2002 46(2019), 11 vom: 29. Juli, Seite 2322-2328 (DE-627)359787258 (DE-600)2098375-X 1619-7089 nnns volume:46 year:2019 number:11 day:29 month:07 pages:2322-2328 https://dx.doi.org/10.1007/s00259-019-04440-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 46 2019 11 29 07 2322-2328
language	English
source	Enthalten in European journal of nuclear medicine and molecular imaging 46(2019), 11 vom: 29. Juli, Seite 2322-2328 volume:46 year:2019 number:11 day:29 month:07 pages:2322-2328
sourceStr	Enthalten in European journal of nuclear medicine and molecular imaging 46(2019), 11 vom: 29. Juli, Seite 2322-2328 volume:46 year:2019 number:11 day:29 month:07 pages:2322-2328
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Stunning Hibernating myocardium Myocardial blood flow Myocardial flow reserve Viability testing
isfreeaccess_bool	false
container_title	European journal of nuclear medicine and molecular imaging
authorswithroles_txt_mv	Benz, Dominik C. @@aut@@ von Dahlen, Anita P. @@aut@@ Huang, Wenjie @@aut@@ Messerli, Michael @@aut@@ von Felten, Elia @@aut@@ Benetos, Georgios @@aut@@ Giannopoulos, Andreas A. @@aut@@ Fuchs, Tobias A. @@aut@@ Gräni, Christoph @@aut@@ Gebhard, Catherine @@aut@@ Pazhenkottil, Aju P. @@aut@@ Gaemperli, Oliver @@aut@@ Kaufmann, Philipp A. @@aut@@ Buechel, Ronny R. @@aut@@
publishDateDaySort_date	2019-07-29T00:00:00Z
hierarchy_top_id	359787258
id	SPR003167437
language_de	englisch
fullrecord	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">SPR003167437</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230519203808.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">201001s2019 xx \|\|\|\|\|o 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/s00259-019-04440-2</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)SPR003167437</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(SPR)s00259-019-04440-2-e</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Benz, Dominik C.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2019</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">© Springer-Verlag GmbH Germany, part of Springer Nature 2019</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Purpose The human pathophysiology of stunned, hibernating and scarred myocardium in ischemic cardiomyopathy is a subject of controversy. While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other theories suggest that a reduced myocardial flow reserve (MFR) may be the cause. Methods We included 110 patients with ischemic cardiomyopathy. Based on quantitative myocardial perfusion assessment and viability imaging with 13N-NH3 and 18F-FDG positron emission tomography, respectively, as well as wall motion assessment from echocardiography, myocardial tissue was characterized as remote (i.e., normal myocardium), stunned (i.e., dysfunctional but viable myocardium with normal rest perfusion), hibernating (i.e., dysfunctional but viable myocardium with impaired rest perfusion), or scarred myocardium (i.e., non-viable myocardium). Results Compared to remote myocardium, dysfunctional but viable myocardium (including stunned and hibernating) had reduced rest MBF (0.89 mL/min/g vs. 0.79 and 0.76 mL/min/g, respectively; p < 0.001) and MFR (1.53 vs. 1.27 and 1.17; p < 0.001). Between stunned and hibernating myocardium, however, rest MBF and MFR did not differ (p = 0.40). In scarred myocardium, rest MBF was lowest (0.66 mL/min/g; p < 0.001) but, in contrast to the other myocardial states, k2 (i.e., tracer washout) was increased (0.199/min vs. 0.178/min to 0.181/min; all p < 0.05 in pairwise comparison). Conclusions In patients with ischemic cardiomyopathy, impaired MFR is associated with stunning and hibernation. These states of dysfunctional but viable myocardium have lower rest MBF compared to remote myocardium. 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author	Benz, Dominik C.
spellingShingle	Benz, Dominik C. misc Stunning misc Hibernating myocardium misc Myocardial blood flow misc Myocardial flow reserve misc Viability testing No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy
authorStr	Benz, Dominik C.
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topic_title	No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy Stunning (dpeaa)DE-He213 Hibernating myocardium (dpeaa)DE-He213 Myocardial blood flow (dpeaa)DE-He213 Myocardial flow reserve (dpeaa)DE-He213 Viability testing (dpeaa)DE-He213
topic	misc Stunning misc Hibernating myocardium misc Myocardial blood flow misc Myocardial flow reserve misc Viability testing
topic_unstemmed	misc Stunning misc Hibernating myocardium misc Myocardial blood flow misc Myocardial flow reserve misc Viability testing
topic_browse	misc Stunning misc Hibernating myocardium misc Myocardial blood flow misc Myocardial flow reserve misc Viability testing
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title	No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy
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title_full	No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy
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journal	European journal of nuclear medicine and molecular imaging
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author_browse	Benz, Dominik C. von Dahlen, Anita P. Huang, Wenjie Messerli, Michael von Felten, Elia Benetos, Georgios Giannopoulos, Andreas A. Fuchs, Tobias A. Gräni, Christoph Gebhard, Catherine Pazhenkottil, Aju P. Gaemperli, Oliver Kaufmann, Philipp A. Buechel, Ronny R.
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author-letter	Benz, Dominik C.
doi_str_mv	10.1007/s00259-019-04440-2
title_sort	no differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy
title_auth	No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy
abstract	Purpose The human pathophysiology of stunned, hibernating and scarred myocardium in ischemic cardiomyopathy is a subject of controversy. While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other theories suggest that a reduced myocardial flow reserve (MFR) may be the cause. Methods We included 110 patients with ischemic cardiomyopathy. Based on quantitative myocardial perfusion assessment and viability imaging with 13N-NH3 and 18F-FDG positron emission tomography, respectively, as well as wall motion assessment from echocardiography, myocardial tissue was characterized as remote (i.e., normal myocardium), stunned (i.e., dysfunctional but viable myocardium with normal rest perfusion), hibernating (i.e., dysfunctional but viable myocardium with impaired rest perfusion), or scarred myocardium (i.e., non-viable myocardium). Results Compared to remote myocardium, dysfunctional but viable myocardium (including stunned and hibernating) had reduced rest MBF (0.89 mL/min/g vs. 0.79 and 0.76 mL/min/g, respectively; p < 0.001) and MFR (1.53 vs. 1.27 and 1.17; p < 0.001). Between stunned and hibernating myocardium, however, rest MBF and MFR did not differ (p = 0.40). In scarred myocardium, rest MBF was lowest (0.66 mL/min/g; p < 0.001) but, in contrast to the other myocardial states, k2 (i.e., tracer washout) was increased (0.199/min vs. 0.178/min to 0.181/min; all p < 0.05 in pairwise comparison). Conclusions In patients with ischemic cardiomyopathy, impaired MFR is associated with stunning and hibernation. These states of dysfunctional but viable myocardium have lower rest MBF compared to remote myocardium. At the end of the continuum, rest MBF is lowest in scar tissue and linked to increased rate of tracer washout. © Springer-Verlag GmbH Germany, part of Springer Nature 2019
abstractGer	Purpose The human pathophysiology of stunned, hibernating and scarred myocardium in ischemic cardiomyopathy is a subject of controversy. While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other theories suggest that a reduced myocardial flow reserve (MFR) may be the cause. Methods We included 110 patients with ischemic cardiomyopathy. Based on quantitative myocardial perfusion assessment and viability imaging with 13N-NH3 and 18F-FDG positron emission tomography, respectively, as well as wall motion assessment from echocardiography, myocardial tissue was characterized as remote (i.e., normal myocardium), stunned (i.e., dysfunctional but viable myocardium with normal rest perfusion), hibernating (i.e., dysfunctional but viable myocardium with impaired rest perfusion), or scarred myocardium (i.e., non-viable myocardium). Results Compared to remote myocardium, dysfunctional but viable myocardium (including stunned and hibernating) had reduced rest MBF (0.89 mL/min/g vs. 0.79 and 0.76 mL/min/g, respectively; p < 0.001) and MFR (1.53 vs. 1.27 and 1.17; p < 0.001). Between stunned and hibernating myocardium, however, rest MBF and MFR did not differ (p = 0.40). In scarred myocardium, rest MBF was lowest (0.66 mL/min/g; p < 0.001) but, in contrast to the other myocardial states, k2 (i.e., tracer washout) was increased (0.199/min vs. 0.178/min to 0.181/min; all p < 0.05 in pairwise comparison). Conclusions In patients with ischemic cardiomyopathy, impaired MFR is associated with stunning and hibernation. These states of dysfunctional but viable myocardium have lower rest MBF compared to remote myocardium. At the end of the continuum, rest MBF is lowest in scar tissue and linked to increased rate of tracer washout. © Springer-Verlag GmbH Germany, part of Springer Nature 2019
abstract_unstemmed	Purpose The human pathophysiology of stunned, hibernating and scarred myocardium in ischemic cardiomyopathy is a subject of controversy. While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other theories suggest that a reduced myocardial flow reserve (MFR) may be the cause. Methods We included 110 patients with ischemic cardiomyopathy. Based on quantitative myocardial perfusion assessment and viability imaging with 13N-NH3 and 18F-FDG positron emission tomography, respectively, as well as wall motion assessment from echocardiography, myocardial tissue was characterized as remote (i.e., normal myocardium), stunned (i.e., dysfunctional but viable myocardium with normal rest perfusion), hibernating (i.e., dysfunctional but viable myocardium with impaired rest perfusion), or scarred myocardium (i.e., non-viable myocardium). Results Compared to remote myocardium, dysfunctional but viable myocardium (including stunned and hibernating) had reduced rest MBF (0.89 mL/min/g vs. 0.79 and 0.76 mL/min/g, respectively; p < 0.001) and MFR (1.53 vs. 1.27 and 1.17; p < 0.001). Between stunned and hibernating myocardium, however, rest MBF and MFR did not differ (p = 0.40). In scarred myocardium, rest MBF was lowest (0.66 mL/min/g; p < 0.001) but, in contrast to the other myocardial states, k2 (i.e., tracer washout) was increased (0.199/min vs. 0.178/min to 0.181/min; all p < 0.05 in pairwise comparison). Conclusions In patients with ischemic cardiomyopathy, impaired MFR is associated with stunning and hibernation. These states of dysfunctional but viable myocardium have lower rest MBF compared to remote myocardium. At the end of the continuum, rest MBF is lowest in scar tissue and linked to increased rate of tracer washout. © Springer-Verlag GmbH Germany, part of Springer Nature 2019
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container_issue	11
title_short	No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy
url	https://dx.doi.org/10.1007/s00259-019-04440-2
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author2	von Dahlen, Anita P. Huang, Wenjie Messerli, Michael von Felten, Elia Benetos, Georgios Giannopoulos, Andreas A. Fuchs, Tobias A. Gräni, Christoph Gebhard, Catherine Pazhenkottil, Aju P. Gaemperli, Oliver Kaufmann, Philipp A. Buechel, Ronny R.
author2Str	von Dahlen, Anita P. Huang, Wenjie Messerli, Michael von Felten, Elia Benetos, Georgios Giannopoulos, Andreas A. Fuchs, Tobias A. Gräni, Christoph Gebhard, Catherine Pazhenkottil, Aju P. Gaemperli, Oliver Kaufmann, Philipp A. Buechel, Ronny R.
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doi_str	10.1007/s00259-019-04440-2
up_date	2024-07-03T17:46:01.122Z
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While the “smart heart” theory postulates that reduced myocardial blood flow (MBF) at rest is responsible for myocytes switching to a state of hibernation, other theories suggest that a reduced myocardial flow reserve (MFR) may be the cause. Methods We included 110 patients with ischemic cardiomyopathy. Based on quantitative myocardial perfusion assessment and viability imaging with 13N-NH3 and 18F-FDG positron emission tomography, respectively, as well as wall motion assessment from echocardiography, myocardial tissue was characterized as remote (i.e., normal myocardium), stunned (i.e., dysfunctional but viable myocardium with normal rest perfusion), hibernating (i.e., dysfunctional but viable myocardium with impaired rest perfusion), or scarred myocardium (i.e., non-viable myocardium). 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No differences in rest myocardial blood flow in stunned and hibernating myocardium: insights into the pathophysiology of ischemic cardiomyopathy

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