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  • Title: [Treatment of severe chronic cardiac insufficiency with dihydralazine. Short-and median-term results].
    Author: Morand P, Lavigne G, Masson D, Latour F, Alison D.
    Journal: Arch Mal Coeur Vaiss; 1979 Mar; 72(3):268-75. PubMed ID: 114137.
    Abstract:
    17 patients with severe chronic heart failure (class III and IV) were prescribed hydralazine, an arterial vasodilatator, orally at doses of 150 mg to 400 mg/day. Considerable clinical improvement was observed in most patients. After 24 to 48 hours the cardiac index rose 79 p. 100, the systolic index by 67 p. 100 and left ventricular work by 73 p. 100, whilst systemic and pulmonary resistances fell by 51 p. 100 and 34 p. 100 respectively. There was no significant change in systemic blood pressure or in heart rate. These results were confirmed at 4 months. Mean pulmonary capillary pressure varied little at the start of treatment but decreased by 52 p. 100 at medium term (4 and 12 months) in this series. No cases of systemic lupus erythematosis were observed. The main, but not the only, indication of therapy with dihydralazine is low output heart failure with little elevation in the pulmonary capillary pressure, especially in primary cardiomyopathy and valvular regurgitation. At present, treatment should be based on the results of cardiac catheterisation and the dosage adjusted according to the rate of hepatic acetylation.
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