[Experimental analysis of some cardiovascular effects of Verapamil]

In vivo and in vitro experiments showed that Verapamil dilates the coronaries, prevents coronary spasm, produces Ca++-antagonism, offers protection against myocardial necrosis, prevents arrhythmia, reduces pressure, increases the purinergic reactivity and produces inhibition of platelet aggregation. It was devoid of competitive-adrenolytic activity in the heart and vessels. A methoxy derivative of the drug (D-600) had a negative inotropic and chronotropic action and was more hypotensive than Verapamil.