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- W1966926449 abstract "In the presence of stenotic coronary arteries, oxygen supply in the poststenotic myocardium is reduced. A counterbalancing poststenotic metabolic vasodilatation is attenuated up to 30% by an alpha 2-adrenoceptor-mediated vasoconstrictor tone. In six open-chest dogs, we determined whether cumulative intracoronary doses (1, 4, and 14 micrograms) BRL 34915, a vasodilator with additional dose-dependent cardiodepressant properties, could enhance coronary blood flow and simultaneously reduce myocardial function in poststenotic myocardium, thereby increasing oxygen supply and decreasing oxygen demand. BRL 34915 increased mean left circumflex coronary blood flow [ml/(min.100 g)] dose-dependently from 59 +/- 12.4 (mean +/- SEM) (no BRL) to 227 +/- 43.9 (14 micrograms BRL) (p less than 0.05) in intact coronary arteries and from 36 +/- 7.2 (no BRL) to 74 +/- 13.2 (14 micrograms BRL) (p less than 0.05) distal to a severe stenosis, respectively. In contrast, posterior systolic wall thickening (%), was significantly decreased only by 14 micrograms BRL from 9.7 +/- 1.82 (no BRL) to 7.8 +/- 2.07 (14 micrograms BRL) (p less than 0.05) when coronary arteries were intact and from 8.7 +/- 2.02 (no BRL) to 4.1 +/- 1.39 (14 micrograms BRL) (p less than 0.05) in poststenotic myocardium. We conclude that BRL 34915 can both enhance coronary blood flow in the poststenotic myocardium and decrease myocardial function simultaneously, potentially narrowing the gap between oxygen supply and demand." @default.
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- W1966926449 date "1990-05-01" @default.
- W1966926449 modified "2023-10-14" @default.
- W1966926449 title "BRL 34915 Ameliorates Oxygen Supply in Ischemic Myocardium by a Simultaneous Enhancement of Coronary Blood Flow and a Reduction of Myocardial function" @default.
- W1966926449 doi "https://doi.org/10.1097/00005344-199005000-00017" @default.
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