Kongkiat Chaikriangkrai et al. JACEP 2015;1:

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Kongkiat Chaikriangkrai et al. JACEP 2015;1:296-305 PV Antral Arrhythmogenesis Pulmonary vein (PV) antral tachycardia arose from the inferior aspect of the native and anastomotic left PV antrum (A, B). The site of origin had complex, prolonged fractionated signals consistent with local conduction slowing, as marked by the red arrow (B). The donor PV was not part of the arrhythmia and had dissociated signals (C). Focal activations arose from the native, anastomotic right inferior PV antrum with a 2:1 conduction pattern over the neighboring left atrium, as shown by the red arrow (D). The site of origin was the native PV antrum, as shown by the close proximity of the recording sites, acquired by the circular multipolar catheter in the same position. Coexisting roof-dependent (E) and perimitral flutter (F) in the same patient was seen, with an area of slow conduction (ablation site indicated by the red arrow and asterisk in E). Abl = ablation site; CS = coronary sinus; d = distal; HIS = His bundle; IVDS = interventricular septal dimension; p = proximal; RA = right atrium. Kongkiat Chaikriangkrai et al. JACEP 2015;1:296-305 American College of Cardiology Foundation