title: Mechanism of augmented premature responses in canine ventricular muscle.
mesh_terms: D000200:Action Potentials; D000818:Animals; D002118:Calcium / Q000494:pharmacology; D004285:Dogs; D009132:Muscles / Q000502:physiology*; D013268:Stimulation, Chemical; D013997:Time Factors; D016276:Ventricular Function; D014700:Verapamil / Q000494:pharmacology
chemical_list: D014700:Verapamil; D002118:Calcium