A Case of Wide Complex Tachycardia With Right Bundle Branch Block-Electrocardiographic Features to Distinguish Supraventricular Tachycardia With Aberrancy Versus Ventricular Tachycardia.

Wide complex tachycardia with right bundle branch block and right axis deviation in young age, fascicular ventricular tachycardia will be the top differential diagnosis to be considered. AV nodal blocking agents like verapamil, diltiazem, and amiodarone are not resolving the WCT with RBBB tachycardia in this case. Not all fascicular VTs are verapamil sensitive unless the verapamil sensitive re-entry pathway is involved.