[Effects of the administration of acebutolol in patients with chronic angina of effort].

12 patients suffering from chronic coronary insufficiency with signs of ischemia in the ECG, were treated orally with 200 mg of acebutolol t.i.d. for a period of 3 weeks. The following parameters were examined at the beginning of the therapy as well as at the end of every week: number of stenocardiac attacks, characteristics of pain, nitroglycerin consumption, B.P., H.R., respiratory rate, ECG, maximal exercise test, PEP, LVET, PEP/LVET at rest and immediately after effort. The treatment with acebutolol was effective inducing an improvement of subjective symptoms (reduction of stenocardiac crises, intensity and duration of angor, trinitrin pearls consumption) and an increase of effort tolerance. The utility of the therapy was also proved by the reduction of the systolic pressure and by the following decrease of hemodynamic overload and, therefore, of the heart muscle's work. This positive effect is due to the reduction of the myocardial oxygen consumption, modulated among others by the bradycardiac action of the drug. The cardioselectivity of acebutolol avoided to cause peripherical disorders usually observed with other non selective beta blocking drugs.