Examination of the electrode position of compound motor action potential in cryoballoon ablation

Abstract

Phrenic nerve injury is prevented by monitoring the diaphragmatic compound motor action potential (CMAP) during cryoballoon ablation for atrial fibrillation. In this study, we recorded CMAPs using the conventional electrode position and the Louis angle position simultaneously and compared the amplitudes of both CMAPs. Both methods showed good correlation. Thus, we conclude that the Louis angle can be used for monitoring CMAPs during cryoballoon ablation.