( 1978 ) found that infusion of dibutyryl ( dbcamp ) , or the beta-adrenergic stimulant epinephrine , or the phosphodiesterase inhibitor theophylline , all produced a marked fall in the ventricular fibrillation threshold and an increase in the duration of the vulnerable period of the isolated perfused rat heart .
C0014563
epinephrine
C0042510
ventricular