1 the effects of agents which produce membrane stabilization ( class i ) , beta 1-adrenoceptor blockade ( class ii ) , prolongation of the cardiac action potential ( class iii ) or inhibition of the slow inward current ( class iv ) were investigated for their ability to increase the ventricular fibrillation threshold ( vft ) or to modify the fall in vft consequent upon coronary artery ligation in the anaesthetized rat .
C0018787
cardiac
C0205042
coronary artery