Peri–coronary sinus atrial flutter associated with prior slow pathway ablation Mitsunori Maruyama, MD, PhD, FHRS, Shunsuke Uetake, MD, PhD, Yasushi Miyauchi,

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Date of download: 9/19/2016 Copyright © The American College of Cardiology. All rights reserved. From: Atrial Tachycardia After Circumferential Pulmonary.

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Presentation transcript:

Peri–coronary sinus atrial flutter associated with prior slow pathway ablation Mitsunori Maruyama, MD, PhD, FHRS, Shunsuke Uetake, MD, PhD, Yasushi Miyauchi, MD, PhD, FHRS, Yoshihiko Seino, MD, PhD, Wataru Shimizu, MD, PhD HeartRhythm Case Reports Volume 4, Issue 1, Pages 10-13 (January 2018) DOI: 10.1016/j.hrcr.2017.10.012 Copyright © 2017 Heart Rhythm Society Terms and Conditions

Figure 1 Surface 12-lead electrocardiogram showing atrial flutter (AFL) with 3:1 atrioventricular conduction. Sawtooth-like negative flutter waves were noted in the inferior leads. The negative flutter waves in all precordial leads were not compatible with typical AFL. HeartRhythm Case Reports 2018 4, 10-13DOI: (10.1016/j.hrcr.2017.10.012) Copyright © 2017 Heart Rhythm Society Terms and Conditions

Figure 2 A: Surface electrocardiogram and intracardiac electrograms from the high right atrium (HRA) and coronary sinus (CS) during induced (AFL #1) and clinical (AFL #2) atrial flutter (AFL). The CS disparate activation pattern was observed both in AFL #1 and AFL #2, but the direction of the CS musculature (arrows) and left atrium (LA; dotted arrows) activations was the opposite between AFL #1 and AFL #2. B: Activation maps of the right atrium (RA) and LA during AFL #1 and AFL #2. Note the counterclockwise and clockwise activations around the CS area in AFL #1 and AFL #2, respectively. A conduction block line across the cavotricuspid isthmus is shown by the red tags. A partial conduction block with slow conduction was noted in the proximal CS. LSPV = left superior pulmonary vein; LIPV = left inferior pulmonary vein; MA = mitral annulus; PPI–TCL = difference between the postpacing interval and tachycardia cycle length. HeartRhythm Case Reports 2018 4, 10-13DOI: (10.1016/j.hrcr.2017.10.012) Copyright © 2017 Heart Rhythm Society Terms and Conditions

Figure 3 A: Intracardiac electrograms at the successful ablation site (see Figure 2B) for AFL #2. Note the double potentials (P1 and P2) with intervening fragmented activities. Abl = ablation catheter; other abbreviations as in Figure 2. B: The AFL terminated 2.7 seconds after the initiation of the radiofrequency (RF) application with conduction block between P1 and P2. C: Alterations in the coronary sinus (CS) electrograms during sinus rhythm before and after the ablation of the slow pathway and AFL. Before the slow pathway ablation in the previous session, the left atrium and CS electrograms were fused and activated in the same direction (left panel). A disparate activation pattern was already noted before the AFL ablation. Note the fragmented delayed potentials in the proximal CS (asterisk), implying an incomplete conduction block in the proximal CS (middle panel). There was a complete conduction block in the proximal CS after the AFL ablation, although isolation of the CS musculature was not achieved (right panel). HeartRhythm Case Reports 2018 4, 10-13DOI: (10.1016/j.hrcr.2017.10.012) Copyright © 2017 Heart Rhythm Society Terms and Conditions