Ventricular arrhythmias originating from the cardiac crux and the basal inferior segment of the interventricular septum in the patients with structural heart diseases: characteristics, mapping, and electrophysiological properties

Autor: Abigail Louise D. Te, Fa Po Chung, Chung Hsing Lin, Yu Feng Hu, Cheng Hung Chiang, Jo Nan Liao, Shinya Yamada, Ta Chuan Tuan, Shih Lin Chang, Hung Kai Huang, Chin Yu Lin, Yao Ting Chang, Li Wei Lo, Yuan Hung, Yenn Jiang Lin, Suresh Allamsetty, Rohit Walia, Shih Ann Chen
Rok vydání: 2018
Předmět:
Zdroj: Journal of Interventional Cardiac Electrophysiology. 52:225-236
ISSN: 1572-8595
1383-875X
DOI: 10.1007/s10840-018-0350-2
Popis: There are few reports describing ventricular arrhythmias (VAs) from the crux and the corresponding endocardial site, i.e., the basal inferior segment of the interventricular septum (IVS). We aimed to investigate a distinct clinical group of VAs arising from the endocardium at this area in patients with structural heart diseases (SHD). We included 17 patients with SHD and clinically documented VAs. Thirteen patients underwent endocardial mapping only. Three patients underwent both epicardial and endocardial approaches and one had only epicardial mapping. Eighteen VAs were identified, 14 focal and 4 reentrant VAs, confirmed by entrainment. There were 2 VAs from the crux, 5 VAs from the corresponding endocardial site in the right ventricle (RV), and 11 from the site in the left ventricle (LV). Compared with the VAs from RV endocardium, VAs from LV endocardium had a higher R wave in V3 than V2 (V2R/V3R ratio, 1.83 ± 0.84 vs. 0.86 ± 0.38, P = 0.008) and a higher V3 transition ratio percentage (2.16 ± 2.07 vs. 0.58 ± 0.62, P = 0.008). Combining all 16 patients with endocardial mapping, there were also lower bipolar voltages (1.21 ± 1.05 vs. 3.10 ± 2.65 mv, P
Databáze: OpenAIRE
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