<prompt> Digoxin is contraindicated in -Supraventricular tachycardiaAtrial fibrillationCongestive hea failureHyperophic obstructive cardioinyopathy  <response>: Ans. is d i.e., Hyperophic obstructive cardiomyopathy Digitalis is contraindicated in o HOCM - By increasing the contractility it decreases the size of ventricle -- obstruction. o Paia1A-V block - Digitalis increases ERP of A-V node -- A.V. conduction -- may conve paial block into complete block. o WPW syndrome - Digitalis slows the conduction in the normal AV bundle and accelerates it in the aberrant pathway -- increase chances of reentry -- ventricular fibrillation may occur. o Ventricular tachycardia - Digitalis decreases the refractory period of ventricle muscle ventricular fibrillation may occur. 