Morphology criteria to differentiate between right and left ventricular outflow tract origins of VT

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Outflow tract ventricular arrhythmias are the most common type of idiopathic ventricular arrhythmias. They typically occur in young patients. Differentiating between right ventricular outflow tract (RVOT) and left ventricular outflow tract (LVOT) origins of VPC/VT is a fundamental task in clinical electrophysiology, as it dictates the procedural approach (venous vs. arterial) for catheter ablation. Since both outflows are superiorly located, both typically present with an inferior axis (tall R-waves in II, III, and aVF). The primary differentiation relies on the horizontal plane (precordial leads). 70-80% of outflow tachycardias originate from right ventricular outflow tract. Small numbers can originate just above the outflow tracts as well, like aortic cusp ventricular tachycardia. Read More: https://johnsonfrancis.org/professional/morphology-criteria-to-differentiate-between-right-and-left-ventricular-outflow-tract-origins-of-vpc-vt/
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Cardiology
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