Abstract
Abstract The inotropic and hemodynamic effect of acutely administered potassium has been studied in the open chest dog by utilizing the strain gauge arch. In both digitalized and nondigitalized dogs, potassium did not significantly alter the right ventricular contractility or cardiac dynamics. The effect of potassium on automaticity was manifested by bradycardia, and the effect on conductivity by fatal arrhythmia. Long term depletion of body potassium in 1 dog and short term depletion in 3 dogs did not alter the inotropic response to acetyl strophanthidin.
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