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  • Title: [Acute and chronic effects of bunazosin in patients with congestive heart failure].
    Author: Kawahara Y, Hasegawa K, Sawayama T, Nezuo S, Inoue S, Tadaoka S.
    Journal: Kokyu To Junkan; 1989 May; 37(5):529-33. PubMed ID: 2568669.
    Abstract:
    The acute hemodynamic effect (right atrial pressure, mean pulmonary artery pressure, pulmonary capillary wedge pressure, cardiac index, heart rate, blood pressure) and neurohumoral response (alpha-ANP, plasma renin activity, aldosterone, angiotensin II) of Bunazosin, oral alpha 1 blocker, was investigated in 28 patients with congestive heart failure at rest and immediately after exercise. Bunazosin reduced alpha-ANP, but, other neurohumoral factors did not change. Bunazosin produced significant hemodynamic improvements both at rest and after exercise. Its chronic effect was also investigated in 11 patients in 28 days after taking oral Bunazosin. Improvement of hemodynamics at acute phase was also preserved at chronic phase without deterioration of neurohumoral factors. It is concluded that Bunazosin may be an effective Balanced vasodilator both at acute and chronic phases in patients with congestive heart failure.
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