Idiopathic ventricular arrhythmias ablating from different subregions in the aortic sinus cusps: anatomic distribution, electrocardiography, and electrophysiology characteristics

Abstract Background Previous studies had described the electrocardiographic or electrophysiological characteristics of ventricular arrhythmias (VAs) from 3 aortic sinus cusps (ASC) as a whole, while little is known about differences among VAs ablated in different subregions ASC. Objective To investigate distribution, specific precordial sign, and bipolar electrogram Methods We divided right coronary cusp (RCC) left (LCC) into 6 studied 51 idiopathic successfully Results Fifty-one inhomogeneous distributed subregions, which rarely located lateral RCC (L-RCC; 2%). The fractionated potential was dominant (39/51, 76%) three kinds target electrograms. From L-RCC to LCC (L-LCC), percentage gradually decreased 100% 59%. A rebound notch V3–4 V4–5 sensitivity 90.9%, specificity 85.0%, negative predictive value (NPV) 97.1% predict ablating anterior (A-RCC). V2–3 50.0%, 94.9%, NPV 86.0% L-LCC. Conclusion targets ASC-VAs mainly ASC Fractionated common electrograms especially anterolateral RCC. Precordial has high accuracy for identifying ASC-VAs. Funding Acknowledgement Type funding sources: None. Figure 1Figure 2