We present a 37-year-old woman with drug refractory atrial fibrillati on refe rred for a pulmonary vein (PV) isolation procedure who manifested a tachycardia with 2:1 intra-PV block within a dissociated PV.During abla...We present a 37-year-old woman with drug refractory atrial fibrillati on refe rred for a pulmonary vein (PV) isolation procedure who manifested a tachycardia with 2:1 intra-PV block within a dissociated PV.During ablation in the right su perior PV, the surface rhythm became normal sinus, with persistent atrial fibril lation within the PV. Shortly thereafter, an atrial tachycardia with a cycle len gth of 190 ms and 2:1 distal to proximal exit block was observed within the isol ated PV. Conduction block within a PV electrically isolated from the left atrium is a newly observed phenomenon that may have imp lications to the electrophysiologic properties of the PV muscular sleeves.展开更多
文摘We present a 37-year-old woman with drug refractory atrial fibrillati on refe rred for a pulmonary vein (PV) isolation procedure who manifested a tachycardia with 2:1 intra-PV block within a dissociated PV.During ablation in the right su perior PV, the surface rhythm became normal sinus, with persistent atrial fibril lation within the PV. Shortly thereafter, an atrial tachycardia with a cycle len gth of 190 ms and 2:1 distal to proximal exit block was observed within the isol ated PV. Conduction block within a PV electrically isolated from the left atrium is a newly observed phenomenon that may have imp lications to the electrophysiologic properties of the PV muscular sleeves.
