Block of branching portion of bundle of His from catheter shaft during ablation of left ventricular outflow tract ventricular premature complexes.

Ventricular premature contractions are often located in the left ventricular outflow tract (LVOT). Components of the normal atrioventricular conduction apparatus are located just below the aortic valve in proximity to the membranous septum, between the noncoronary cusp and right coronary cusp. We present a case of injury to the bundle of His during an ablation of a ventricular premature contraction in the LVOT below the left coronary cusp, remote from the bundle of His, due to pressure from the proximal shaft of the catheter between the noncoronary cusp and the right coronary cusp.