Radiofrequency catheter ablation of ventricular arrhythmias arising from the region above pulmonary valve

• Published in: BMC cardiovascular disorders Vol. 19; no. 1; p. 233
• Main Authors: Li, Jin, Zheng, Cheng, Liu, Zhi-Rui, Ma, Jun, Jin, Ge, Lin, Wei-Qian, Wang, Yao-Yao, Lin, Jia-Feng
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 22.10.2019; BioMed Central; BMC
• Subjects: Ablation (Surgery); Arrhythmia; Care and treatment; ECG characteristics; Electrocardiography; Electrophysiological characteristics; Medical research; PSCs and MSPA; Radiofrequency catheter ablation; Valves; Ventricular arrhythmias; Ventricular arrhythmias; PSCs and MSPA; Radiofrequency catheter ablation; ECG characteristics; Electrophysiological characteristics
• ISSN: 1471-2261; 1471-2261
• DOI: 10.1186/s12872-019-1220-2

Ventricular arrhythmias (VAs) arising from the origin above pulmonary valve lack comprehensive investigation. This study aimed to disclose the characteristics and radiofrequency catheter ablation (RFCA) outcomes for those VAs. One hundred six VAs arising from the region above pulmonary valve treated with RFCA were included in this study. Seventy-five cases were identified in the pulmonary sinus cusps (PSCs, 32 in left sinus cusp (PLC), 15 in right (PRC), 28 in anterior (PAC)) and 31 cases were in the main stem of pulmonary artery (MSPA, 18 above PLC (LMSPA), 3 above PRC (RMSPA), 10 above PAC (AMSPA)). Compared with PSCs VAs, MSPA VAs exhibited a higher R wave amplitude in the inferior leads, a total inferior R amplitude > 5.1 mV predicting MSPA origins. LMSPA, RMSPA and AMSPA VAs resembled PLC, PRC and PAC VAs in electrocardiographic characteristics respectively. No electrophysiological differences were found between PSCs and MSPA VAs. The irrigated-up catheter and R0 Swartz long sheath were more utilized for ablation of PSCs VAs than for MSPA VAs. All these VAs were successfully eliminated by RFCA. VAs arising from the origin above pulmonary valve were common. Based on certain electrocardiographic characteristics, they could be roughly located, which contributed to an effective RFCA.