K Lance Gould1, Danai Kitkungvan2, Nils P Johnson2, Tung Nguyen2, Richard Kirkeeide2, Linh Bui2, Monica B Patel2, Amanda E Roby2, Mohammad Madjid2, Hongjian Zhu3, Dejian Lai3. 1. Weatherhead PET Center for Preventing and Reversing Atherosclerosis, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, USA. Electronic address: k.lance.gould@uth.tmc.edu. 2. Division of Cardiology, Department of Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, USA. 3. University of Texas Health Science Center at Houston and Memorial Hermann Hospital, Houston, Texas, USA.
Abstract
OBJECTIVES: This study sought to determine the relationship between the severity of reduced quantitative perfusion parameters and mortality with and without revascularization. BACKGROUND: The physiological mechanisms for differential mortality risk of coronary flow reserve (CFR) and coronary flow capacity (CFC) before and after revascularization are unknown. METHODS: Global and regional rest-stress (ml/min/g), CFR, their regional per-pixel combination as CFC, and relative stress in ml/min/g were measured as percent of LV in all serial routine 5,274 diagnostic PET scans with systematic follow-up over 10 years (mean 4.2 ± 2.5 years) for all-cause mortality with and without revascularization. RESULTS: Severely reduced CFR of 1.0 to 1.5 and stress perfusion ≤1.0 cc/min/g incurred increasing size-dependent risks that were additive because regional severely reduced CFC (CFCsevere) was associated with the highest major adverse cardiac event rate of 80% (p < 0.0001 vs. either alone) and a mortality risk of 14% (vs. 2.3% for no CFCsevere; p = 0.001). Small regions of CFCsevere ≤0.5% predicted high risk (p < 0.0001 vs. no CFCsevere) related to a wave front of border zones at risk around the small most severe center. By receiver-operating characteristic analysis, relative stress topogram maps of stress (ml/min/g) as a fraction of LV defined these border zones at risk or for mildly reduced CFC (area under the curve [AUC]: 0.69) with a reduced relative tomographic subendocardial-to-subepicardial ratio. CFCsevere incurred the highest mortality risk that was reduced by revascularization (p = 0.005 vs. no revascularization) for artery-specific stenosis not defined by global CFR or stress perfusion alone. CONCLUSIONS: CFC is associated with the size-dependent highest mortality risk resulting from the additive risk of CFR and stress (ml/min/g) that is significantly reduced after revascularization, a finding not seen for global CFR. Small regions of CFCsevere ≤0.5% of LV also carry a high risk because of the surrounding border zones at risk defined by relative stress perfusion and a reduced relative subendocardial-to-subepicardial ratio.
OBJECTIVES: This study sought to determine the relationship between the severity of reduced quantitative perfusion parameters and mortality with and without revascularization. BACKGROUND: The physiological mechanisms for differential mortality risk of coronary flow reserve (CFR) and coronary flow capacity (CFC) before and after revascularization are unknown. METHODS: Global and regional rest-stress (ml/min/g), CFR, their regional per-pixel combination as CFC, and relative stress in ml/min/g were measured as percent of LV in all serial routine 5,274 diagnostic PET scans with systematic follow-up over 10 years (mean 4.2 ± 2.5 years) for all-cause mortality with and without revascularization. RESULTS: Severely reduced CFR of 1.0 to 1.5 and stress perfusion ≤1.0 cc/min/g incurred increasing size-dependent risks that were additive because regional severely reduced CFC (CFCsevere) was associated with the highest major adverse cardiac event rate of 80% (p < 0.0001 vs. either alone) and a mortality risk of 14% (vs. 2.3% for no CFCsevere; p = 0.001). Small regions of CFCsevere ≤0.5% predicted high risk (p < 0.0001 vs. no CFCsevere) related to a wave front of border zones at risk around the small most severe center. By receiver-operating characteristic analysis, relative stress topogram maps of stress (ml/min/g) as a fraction of LV defined these border zones at risk or for mildly reduced CFC (area under the curve [AUC]: 0.69) with a reduced relative tomographic subendocardial-to-subepicardial ratio. CFCsevere incurred the highest mortality risk that was reduced by revascularization (p = 0.005 vs. no revascularization) for artery-specific stenosis not defined by global CFR or stress perfusion alone. CONCLUSIONS: CFC is associated with the size-dependent highest mortality risk resulting from the additive risk of CFR and stress (ml/min/g) that is significantly reduced after revascularization, a finding not seen for global CFR. Small regions of CFCsevere ≤0.5% of LV also carry a high risk because of the surrounding border zones at risk defined by relative stress perfusion and a reduced relative subendocardial-to-subepicardial ratio.
Authors: Edward P Ficaro; Venkatesh L Murthy; Alexis Poitrasson-Rivière; Jonathan B Moody; Jennifer M Renaud; Tomoe Hagio; Liliana Arida-Moody; Christopher Buckley; Richard L Weinberg Journal: J Nucl Cardiol Date: 2021-11-15 Impact factor: 3.872
Authors: Valerie Stegehuis; Jelmer Westra; Coen Boerhout; Martin Sejr-Hansen; Ashkan Eftekhari; Hernan Mejía-Renteria; Maribel Cambero-Madera; Niels Van Royen; Hitoshi Matsuo; Masafumi Nakayama; Maria Siebes; Evald Høj Christiansen; Tim Van de Hoef; Jan Piek Journal: Diagnostics (Basel) Date: 2022-07-21
Authors: Ruben W de Winter; Ruurt A Jukema; Pepijn A van Diemen; Stefan P Schumacher; Roel S Driessen; Wynand J Stuijfzand; Henk Everaars; Michiel J Bom; Albert C van Rossum; Peter M van de Ven; Niels J Verouden; Alexander Nap; Pieter G Raijmakers; Ibrahim Danad; Paul Knaapen Journal: Eur Heart J Cardiovasc Imaging Date: 2022-06-01 Impact factor: 9.130