Epicardial‐endocardial breakthrough site ablation: Demonstration of alternative target for perimitral atrial tachycardia. (2nd April 2019)

• Record Type: Journal Article
• Authors: Sato, Yoshikazu; Kusa, Shigeki; Hachiya, Hitoshi; Iesaka, Yoshito
• Is Part Of: Journal of cardiovascular electrophysiology. Volume 30:Number 7(2019)
• Page Start: 1148
• Page End: 1149
• Publication Date: 2019-04-02
• Subjects: catheter ablation -- epicardial conduction -- mitral isthmus -- perimitral atrial tachycardia -- ultrahigh resolution mapping; Blood vessels -- Physiology -- Periodicals; Electrophysiology -- Periodicals; Heart -- Physiology -- Periodicals; 612.1
• DOI: 10.1111/jce.13923
• Languages: English
• ISSNs: 1045-3873

Abstract

Abstract: A 62‐year‐old man underwent the catheter ablation for persistent atrial tachycardia (AT) with a cycle length of 357 milliseconds. An ultrahigh resolution mapping revealed that this tachycardia was a clockwise perimitral AT despite the conduction was apparently blocked across the lateral mitral isthmus line both at the endocardium and within the coronary sinus. The AT was terminated by the single radiofrequency application at the site below the mitral isthmus line where the endocardial activation breakout was seen. This case suggests that the epicardial‐endocardial conduction breakthrough site may be an alternative ablation target in a difficult ablation case of perimitral AT.