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Catheter ablation of ventricular arrhythmias with QRS morphology resembling that of aortic sinus cusp arrhythmias: Significance of mapping the left pulmonary sinus cusp
Author(s) -
Liang Zhuo,
Wang Yunlong,
Zhang Tao,
Han Zhihong,
Dong Jianzeng,
Ren Xuejun
Publication year - 2018
Publication title -
journal of cardiovascular electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.193
H-Index - 138
eISSN - 1540-8167
pISSN - 1045-3873
DOI - 10.1111/jce.13460
Subject(s) - medicine , cusp (singularity) , cardiology , qrs complex , aortic sinus , catheter ablation , ablation , coronary sinus , sinus (botany) , aorta , botany , geometry , mathematics , biology , genus
Background There is a close anatomical relationship between aortic sinus cusp (ASC) and the left pulmonary sinus cusp (LPSC). Purpose The study was to investigate the significance of mapping and ablation of LPSC for ventricular arrhythmias (VAs) with QRS morphology resembling that of ASC arrhythmias. Methods In 33 consecutive patients undergoing successful catheter ablation of idiopathic VAs with ASC arrhythmia‐like QRS morphology, LPSC was mapped carefully. Results Among the 33 patients studied, QRS morphology resembled that of arrhythmias of either right or left coronary cusp (LCC or RCC) origin in 17 and 16 patients, respectively. Out of 12 arrhythmias with the earliest potential in LCC during left‐sided mapping, an earlier potential in LPSC than in LCC was recorded in 2 arrhythmias, the same earliest potential in LPSC as in LCC was recorded in 6 arrhythmias, and 5 (42%) were finally ablated successfully in LPSC using the reversed U curve. Out of 16 arrhythmias with the earliest potential in the RCC during left‐sided mapping, an earlier potential in LPSC than in RCC was recorded in 4 arrhythmias, the same earliest potential in LPSC as in RCC was recorded in 3 arrhythmias, and 4 (25%) were finally ablated successfully in LPSC using the reversed U curve. Conclusions For VAs with ASC arrhythmia‐like QRS morphology, mapping in LPSC could have unique electrophysiologic characteristics, and some of them could be eliminated in LPSC using reversed U curve.