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. 2021 Dec 20;8:778866. doi: 10.3389/fcvm.2021.778866

Figure 5.

Figure 5

A patient who suffered from premature ventricular contraction (PVC) with left bundle branch block morphology and inferior axis deviation ablated in the right-anterior ASV. (A) The ECG of PVC showed a rebound notch on leads V4-V5; the final target revealed a reversal potential (compared with sinus rhythm) that preceded the onset of QRS for 39 ms during PVC and the pace mapping showed a similarity of 98%. (B) The ventricular bigeminy rhythm disappeared immediately after radiofrequency (RF) initiation and the late potential (blue arrow) during sinus rhythm was eliminated after 60 s of RF. (C) The ablated target was located at the right-anterior ASV through intracardiac echocardiography. ABL-D/P, distal or proximal bipolar electrogram; Uni-D, distal unipolar electrogram; SR, sinus rhythm; PM, pace mapping; ABL, ablation catheter; ASV, aortic sinus of Valsalva; N, non-coronary ASV; L, left ASV; R, right ASV; Pos., posterior; Ant., anterior.