these basic pharmacological properties explain why all these three agents have clinical effects relevant to inhibition of vascular contraction ( antihypertensive and antianginal effects ) and only verapamil and diltiazem have clinically relevant inhibitory effects on the av node ( inhibition of supraventricular tachycardias ) .
C0012373
diltiazem
C0039240
supraventricular tachycardias