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- W2760468045 abstract "A 76-year-old-man with a history of multiple catheter ablation procedures for atrial fibrillation was admitted for atrial tachycardia (AT) (cycle length 230 ms) ablation. He had undergone bilateral extensive pulmonary vein isolation, ablation of complex fractionated atrial electrogram, roof line, bottom line, mitral isthmus block line, cavotricuspid isthmus line, and superior vena cava isolation. An endocardial activation map in the left atrium was attempted with the Rhythmia mapping system (Boston Scientific, Marlborough, MA) during AT. The activation map revealed a leap frog pattern in which the activation signal bypassed the scar to reach its destination along the intended clockwise perimitral AT. Suspecting the vein of Marshall (VOM) to be an epicardial connection, a 2Fr octapolar catheter (EPstar Fixed, Japan Lifeline, Tokyo, Japan) was advanced into the VOM. The activation map was completely constructed and filled the entire reentrant circuit involving the VOM (Figure 1 and Supplemental Video 1). The postpacing interval from distal to the VOM, the bottom of the left atrial appendage, and the 9 o’clock direction from the mitral annulus were equal to the tachycardia cycle length. An ablation catheter was placed on the opposite side of the VOM (red tag in Figure 1), and radiofrequency ablation was performed. During radiofrequency application, AT was terminated. After ablation, bidirectional block was observed, with differential pacing on either side of the mitral isthmus. Perimitral AT with an epicardial connection involving the VOM has been reported.1Hayashi T. Fukamizu S. Mitsuhashi T. Kitamura T. Aoyama Y. Hojo R. Sugawara Y. Sakurada H. Hiraoka M. Fujita H. Momomura S. Peri-mitral atrial tachycardia using the Marshall bundle epicardial connections.JACC Clin Electrophysiol. 2016; 2: 27-35Crossref PubMed Scopus (33) Google Scholar The role of the VOM was demonstrated during pacing2Thompson N. Kitamura T. Martin R. Derval N. Denis A. Jaïs P. Demonstration of persistent conduction across the mitral isthmus via the vein of Marshall with high-density activation mapping.Circ Arrhythm Electrophysiol. 2017; 10: e005152Crossref PubMed Scopus (10) Google Scholar; however, no activation map during tachycardia previously has been reported. Download .docx (.01 MB) Help with docx files Legend for Supplemental Video 1eyJraWQiOiI4ZjUxYWNhY2IzYjhiNjNlNzFlYmIzYWFmYTU5NmZmYyIsImFsZyI6IlJTMjU2In0.eyJzdWIiOiIwZmE0MzcwMGZhOTM3NzQ3YTEyNzEyOGNhYzI4ODI0MCIsImtpZCI6IjhmNTFhY2FjYjNiOGI2M2U3MWViYjNhYWZhNTk2ZmZjIiwiZXhwIjoxNjc3NzY4NjEyfQ.n6hVQPf067cjEeB176sUfFc1GwR2hkWkfdRtiqv8QK8VKMA2AuJNzaCMGjTVMGwGuXQzytdkktQhClaOmXKZKIOKcY4IHcYxgMRc6Gjdh1GX_Ke4J-dpPI9gbxPOmghlUjW5aw-SLvqy0z09gyBJdO4wE8Dv-xZNz7cStHmc3TenUEAP47G2-rEy_EYEo2B1ta47AexE8mDijYFLEHBWWs9anXNjiXVBl4gVG1hZrDmCyKREWJ2F4_aA0vDL97H3yUogk_w3mMCv0D0QJuLL4HTyCiK9BaAb9ANwJ87S9-03l8Lf-Lm4pZ-bxaxfMKn8QMEUxLZ3vTr_jZi4gMWuFg Download .mp4 (4.42 MB) Help with .mp4 files Supplemental Video 1" @default.
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- W2760468045 date "2018-01-01" @default.
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- W2760468045 title "High-density activation mapping during perimitral atrial tachycardia demonstrates epicardial connection through the vein of Marshall" @default.
- W2760468045 cites W2223955890 @default.
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- W2760468045 doi "https://doi.org/10.1016/j.hrthm.2017.09.040" @default.
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