1. The sensitizing effect of veratrum alkaloids to potassium is not specific. Reducing the concentration of chloride in Ringer's solution, or treating the muscle with nicotine in a concentration close to threshold after pretreatment with subliminal concentration of cevadine result in a marked
Studies were undertaken in the isolated blood perfused dog heart to determine the nature of the myocardial refractoriness induced by veratrum alkaloids. The initial intracoronary injection of cryptenamine acetates (Unitensin) was always associated with an increase in myocardial contractility and a
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