Kumagai Koichiro
Department of Cardiology, Fukuoka University Hospital, Fukuoka, Japan.
Heart Rhythm. 2007 Mar;4(3 Suppl):S7-S12. doi: 10.1016/j.hrthm.2006.12.013. Epub 2006 Dec 15.
The electrophysiological properties within the pulmonary vein (PV) and PV-left atrial (LA) junction were evaluated using a basket catheter in patients with paroxysmal atrial fibrillation. The effective refractory period of the distal PV was significantly shorter than that of the PV-LA junction. The conduction delay from the distal to proximal PV was significantly longer than that from the proximal to distal PV. During initiation of AF, a reentry involving exit and entrance breakthrough points at the PV-LA junction was observed. The presence of anisotropic conduction properties at the PV-LA junction may be critical to promote reentry formation.
使用篮状导管对阵发性心房颤动患者肺静脉（PV）和PV-左心房（LA）交界处的电生理特性进行了评估。远端PV的有效不应期明显短于PV-LA交界处。从远端PV到近端PV的传导延迟明显长于从近端PV到远端PV的传导延迟。在房颤发作期间，观察到在PV-LA交界处存在涉及出口和入口突破点的折返。PV-LA交界处各向异性传导特性的存在可能对促进折返形成至关重要。
