Abstract
Summary
1. Maximal digitalization caused a decrease in the potassium and calcium content of auricular muscle and a gain in sodium which does not appear to compensate for the loss of potassium and calcium. Ventricular muscle showed a gain in sodium which does not appear to compensate for the loss of potassium and calcium. Ventricular muscle showed a gain in sodium in the absence of any other significant changes. 2. The changes in sodium, potassium and calcium following digitalization occurred in the absence of significant changes in the water content of the digitalized heart.
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