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- W2038863675 abstract "The short-term effects of sublingual nifedipine (20 mg) on cardiac output and its distribution at rest and during exercise were evaluated by measurement of iliofemoral blood flow and cardiac output in 10 men with stable angina pectoris controlled by metoprolol. At rest, nifedipine significantly decreased iliofemoral vascular resistance from 294 +/- 36 to 165 +/- 29 dynes.s.cm-5.10(2) (p less than 0.01) and significantly increased iliofemoral blood flow from 0.34 +/- 0.04 to 0.57 +/- 0.11 liters/min (p less than 0.05). Systemic vascular resistance was reduced from 19 +/- 1 to 13 +/- 1 dynes.s.cm-5.10(2) (p less than 0.001) and cardiac output increased significantly from 4.7 +/- 0.3 to 5.8 +/- 0.5 liters/min (p less than 0.05). Mean arterial pressure decreased significantly and heart rate increased significantly. During maximal upright bicycle exercise during nifedipine therapy, iliofemoral vascular resistance and leg blood flow were unchanged compared with control (23 +/- 2 versus 21 +/- 3 dynes.s.cm-5.10(2) and 4.7 +/- 0.5 versus 4.4 +/- 0.6 liters/min), cardiac output remained significantly increased (12.8 +/- 0.8 to 15.2 +/- 1.2 liters/min, p less than 0.05) and systemic vascular resistance remained significantly reduced (8 +/- 1 to 5 +/- 1 dynes.s.cm-5.10(2); p less than 0.001). The proportion of cardiac output distributed to the working lower limbs was significantly reduced at all exercise levels. In summary, nifedipine caused a redistribution of cardiac output by vasodilating nonexercising vascular beds without altering the locally mediated vasodilation in exercising muscle. In patients with coronary artery disease given nifedipine therapy, an increase in exercise tolerance is due to relief of myocardial ischemia rather than to increased peripheral oxygen delivery." @default.
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- W2038863675 date "1988-04-01" @default.
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- W2038863675 title "Regional distribution of cardiac output at rest and during exercise in patients with exertional angina pectoris before and after nifedipine therapy" @default.
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- W2038863675 doi "https://doi.org/10.1016/0735-1097(88)90220-3" @default.
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