Hence if chlorthiazides are administered in patients on digitalis therapy then these increase the toxicity of digitalis. Q.7 Digitalis is called as cardiotonic. Ans: Digitalis has direct action on myocardium. It increases the force of cardiac contraction This lead to complete ventricular emptying. The duration of systole is decreased allowing greater time to ventricular filling and heart rest Diastolic size of heart is reduced. Hence oxygen expenditure is reduced Digitalis improve energy utilization Thus digitalized heart do same work with less energy Therefore digitalis is called as cardiotonic.
Hence if chlorthiazides are administered in patients on digitalis therapy then these increase the toxicity of digitalis. Q.7 Digitalis is called as cardiotonic. Ans: Digitalis has direct action on myocardium. It increases the force of cardiac contraction This lead to complete ventricular emptying. The duration of systole is decreased allowing greater time to ventricular filling and heart rest Diastolic size of heart is reduced. Hence oxygen expenditure is reduced Digitalis improve energy utilization Thus digitalized heart do same work with less energy Therefore digitalis is called as cardiotonic.
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