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Oral therapy with phentolamine in chronic congestive heart failure
Insights
Oral phentolamine therapy significantly improved left ventricular function in patients with chronic heart failure. This study investigated the effects of phentolamine on heart failure patients, showing positive outcomes.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Phentolamine's inotropic and vasodilating effects suggest potential benefits for congestive heart failure.
- Oral phentolamine therapy has not been extensively studied in chronic heart failure patients.
Purpose of the Study:
- To investigate the efficacy of oral phentolamine in improving left ventricular function in patients with chronic heart failure.
Main Methods:
- Nine patients with chronic heart failure received 50 mg of oral phentolamine four times daily for two weeks.
- Echocardiograms and systolic time intervals were measured before and after treatment.
Main Results:
- Significant increases in ejection fraction, percentage change in minor axis, and velocity of circumferential fiber shortening.
- Significant decrease in left atrial dimension, preejection period index, and preejection period/left ventricular ejection time ratio.
Conclusions:
- Oral phentolamine therapy effectively improves left ventricular function in patients suffering from chronic heart failure.
Abstract:
Therapy with phentolamine can improve the condition of patients with congestive heart failure due to the inotropic effect of this drug, as well as its vasodilating action. The use of oral therapy with phentolamine has not been adequately investigated in patients with chronic heart failure. Therefore, nine patients with chronic heart failure due to underlying valvular disease received 50 mg of phentolamine four times a day for two weeks. Echocardiograms and measurements of systolic time intervals were obtained prior to administration of phentolamine and two weeks after the introduction of therapy with the drug. As a result of therapy with phentolamine, the ejection fraction, the percentage of change in the minor axis, and the velocity of circumferential fiber shortening significantly increased, while the left atrial dimension decreased. Therapy with phentolamine produced a significant decrease in the preejection period index, as well as the ratio of the preejection period over the left ventricular ejection time. Thus, oral therapy with phentolamine improves left ventricular function in patients with chronic heart failure.