to provide further evidence that the veratrum alkaloids ' mechanical , positive inotropic effect and not their chemical depolarising action predominates in initiating the left ventricular mechanoreceptor ( including the bezold ) reflex the effect of intracoronary kcl , a chemical depolarising agent like the veratrum alkaloids , but with a negative inotropic effect , was studied in beating and verapamil-asystolic hearts .
C0225897
left ventricular
C0018787
hearts