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- W3141121113 abstract "After a myocardial infarction (MI), the remaining myocardium undergoes a compensatory reactive hypertrophy. Although coronary perfusion to the surviving myocardium can be an important determinant of cardiac function in this setting, there are no available data regarding myocardial blood flow in reactive hypertrophy. Accordingly, we measured coronary blood flow and reserve using radioactive microspheres in rats 4 weeks after induction of an MI by ligation of the left coronary artery. Maximal coronary dilation was induced by Carbochrome, a potent coronary vasodilator, infused at a rate of 0.45 mg/kg/min up to a total dose of 12 mg/kg. Sham-operated rats served as controls. All animals in the infarct group had a large MI affecting 30-51% (average, 41%) of the left ventricle. Left ventricular end-diastolic pressure was significantly elevated (30 +/- 6.5 vs. 8.0 +/- 2.5 mm Hg in sham-operated rats, p less than 0.01) and baseline hemodynamic indexes of cardiac performance were significantly (p less than 0.01) r..." @default.
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- W3141121113 date "1990-01-01" @default.
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- W3141121113 title "Coronary reserve is depressed in postmyocardial infarction reactive cardiac hypertrophy." @default.
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