BACKGROUND: Typical right atrial isthmus-dependent flutters have been described in detail, but very little is known about left atrial (LA) flutters. METHODS AND RESULTS: We performed conventional and 3D mapping of the LA for 22 patients with atypical flutters. Complete maps in 17 patients demonstrated macroreentrant circuits (n=15) with 1 to 3 loops rotating around the mitral annulus, the pulmonary veins, and a zone of block or a silent area. In 2 patients, a small reentry circuit with a zone of markedly slow conduction was identified. Linear ablation performed across the most accessible part of the circuit cured 16 patients (73%) with a follow-up of 15+/-7 months. CONCLUSIONS: LA reentrant tachycardias are related to individually varying circuits and are amenable to mapping guided radiofrequency ablation.
BACKGROUND: Typical right atrial isthmus-dependent flutters have been described in detail, but very little is known about left atrial (LA) flutters. METHODS AND RESULTS: We performed conventional and 3D mapping of the LA for 22 patients with atypical flutters. Complete maps in 17 patients demonstrated macroreentrant circuits (n=15) with 1 to 3 loops rotating around the mitral annulus, the pulmonary veins, and a zone of block or a silent area. In 2 patients, a small reentry circuit with a zone of markedly slow conduction was identified. Linear ablation performed across the most accessible part of the circuit cured 16 patients (73%) with a follow-up of 15+/-7 months. CONCLUSIONS: LA reentrant tachycardias are related to individually varying circuits and are amenable to mapping guided radiofrequency ablation.
Authors: Anthony J Salmin; Prasanth Ganesan; Kristina E Shillieto; Elizabeth M Cherry; David T Huang; Arkady M Pertsov; Behnaz Ghoraani Journal: Conf Proc IEEE Eng Med Biol Soc Date: 2016-08
Authors: Sohail Zahid; Kaitlyn N Whyte; Erica L Schwarz; Robert C Blake; Patrick M Boyle; Jonathan Chrispin; Adityo Prakosa; Esra G Ipek; Farhad Pashakhanloo; Henry R Halperin; Hugh Calkins; Ronald D Berger; Saman Nazarian; Natalia A Trayanova Journal: Heart Rhythm Date: 2016-04-19 Impact factor: 6.343