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- W2030141867 abstract "Effects of nipradilo! on hemodynamics and transmural energy metabolism of underperfused (ischemic) canine hearts were investigated. The ischemic heart was prepared by constricting a tube connecting the circumflex coronary artery with the carotid artery for 10 min so that the perfusion pressure (CPP) was reduced to 30 mmHg. The reduction in CPP resulted in decreases in coronary blood flow (CBF) by 70%, regional myocardial contractile force (MCF) by 30%, myocardial ATP contents by 32% (inner layer)-22% (outer) and creatine phosphate by 75% (inner)-60% (outer). Increases in the left ventricular end diastolic pressure (LVEDP) by 4.8 mmHg, myocardial inorganic phosphate contents by 1.9 times (inner)-1.3 (outer) and lactate by 4.3 times (inner)-2.4 (outer) were also observed. In dogs with normal hearts, an infusion of nipradilol (10 μg/kg/min, i.v., for 15 min) decreased CPP by 25%, CBF by 40%, cardiac effort index by 45% and MCF by 30 to 40%, and it slightly increased LVEDP without affecting myocardial high-energy phosphate and lactate levels. In ischemic hearts, nipradilo! infusion starting 5 min before ischemia attenuated the ischemia-induced elevation of LVEDP to 1.8 mmHg, and the ischemia-induced changes in high-energy phosphate contents to 1/2 (inner)-1/3 (outer) and changes in lactate to 1/6 (inner)-1/10 (outer). These results indicate that nipradilol improves the ischemic derangement of both transmural energy metabolism and hemodynamics." @default.
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- W2030141867 date "1987-01-01" @default.
- W2030141867 modified "2023-09-26" @default.
- W2030141867 title "Effects of Nipradilol, a New β-Adrenoceptor Blocking Agent with Vasodilating Properties, on Transmural Energy Metabolism in the Underperfused Canine Heart" @default.
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- W2030141867 doi "https://doi.org/10.1254/jjp.44.145" @default.
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