1. Atrial tachycardia originating from the right superior pulmonary vein (RSPV) after sinus node crushing and SG stimulation.
Atrial tachycardia originating from the right superior pulmonary vein (RSPV) after sinus node crushing and SG stimulation. A: isochrone maps during baseline sinus rhythm before sinus node crushing. B: after sinus node crushing, SG stimulation induced pulmonary vein (PV) tachycardia (beat b). When tachycardia terminates, a junctional atrial rhythm ensued (beat c). Electrograms 1–4 are taken from sites adjacent to the early ectopic site during beat b of PV tachycardia. Arrows in A and B indicate earliest sites of activity during beats a–c. RAFW, right atrial free wall; LSPV, left superior PV; LIPV, left inferior PV; RIPV, right inferior PV; VOM, vein of Marshall; LA, left atrium; RA, right atrium.
Alex Y. Tan et al. Am J Physiol Heart Circ Physiol 2008;295:H691-H698
©2008 by American Physiological Society