Jinlin Zhang1, Ming Liang2, Zulu Wang2, Xi Zhang3, Jie Fan3, Yuhe Jia4, Fangyi Xiao5, Biao Fu6, Hao Zhang6, Jin Huang7. 1. Department of Cardiology, Wuhan Asian Heart Hospital, Wuhan, China. Electronic address: zjl1974@yeah.net. 2. Department of Cardiology, General Hospital of Northern Theater Command, Shenyang, China. 3. Department of Cardiology, The First People's Hospital of Yunnan Province, Kunming, China. 4. Center for Cardiac Arrhythmia, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. 5. Department of Cardiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China. 6. Department of Cardiology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, China. 7. Johnson & Johnson (Shanghai) Medical Equipment Co, Ltd, Shanghai, China.
Abstract
BACKGROUND: Clinical studies have suggested that there is a significant correlation between left ventricular (LV) false tendon and premature ventricular complexes (PVCs). OBJECTIVE: This study aimed to investigate the electrophysiological characteristics and the outcome of radiofrequency catheter ablation (RFCA) for this category of PVCs. METHODS: From a total of 2284 patients with idiopathic PVCs who underwent catheter ablation at 6 institutions in China, intracardiac echocardiography (ICE) was used during the procedure in 346 cases; 10 patients (2.9%) with PVCs associated with false tendon were retrospectively reviewed and enrolled in the present study. Activation mapping and pace mapping were performed to localize the origin of PVCs. ICE was used in all patients. If the false tendon was directly visualized and identified, we attempted to identify the distinct relationship with the PVC origin. RESULTS: The PVCs were successfully eliminated by ablation in all patients. The target sites were confirmed to be related to false tendon. The origin of PVCs was located at the attachment of the false tendon to the papillary muscle, LV septum, or LV apex. At the target site, high-frequency Purkinje potentials were observed preceding local ventricular activation in 7 patients. CONCLUSION: LV false tendon can be associated with PVCs, which can be cured by RFCA. An ICE-guided electroanatomical approach should be considered to improve the safety and feasibility of this procedure.
BACKGROUND: Clinical studies have suggested that there is a significant correlation between left ventricular (LV) false tendon and premature ventricular complexes (PVCs). OBJECTIVE: This study aimed to investigate the electrophysiological characteristics and the outcome of radiofrequency catheter ablation (RFCA) for this category of PVCs. METHODS: From a total of 2284 patients with idiopathic PVCs who underwent catheter ablation at 6 institutions in China, intracardiac echocardiography (ICE) was used during the procedure in 346 cases; 10 patients (2.9%) with PVCs associated with false tendon were retrospectively reviewed and enrolled in the present study. Activation mapping and pace mapping were performed to localize the origin of PVCs. ICE was used in all patients. If the false tendon was directly visualized and identified, we attempted to identify the distinct relationship with the PVC origin. RESULTS: The PVCs were successfully eliminated by ablation in all patients. The target sites were confirmed to be related to false tendon. The origin of PVCs was located at the attachment of the false tendon to the papillary muscle, LV septum, or LV apex. At the target site, high-frequency Purkinje potentials were observed preceding local ventricular activation in 7 patients. CONCLUSION: LV false tendon can be associated with PVCs, which can be cured by RFCA. An ICE-guided electroanatomical approach should be considered to improve the safety and feasibility of this procedure.