Division of Cardiology, Gunma Prefectural Cardiovascular Center, Maebashi City, Gunma, Japan.
Pacing Clin Electrophysiol. 2022 May;45(5):700-702. doi: 10.1111/pace.14440. Epub 2022 Jan 17.
A 77-year-old man underwent catheter ablation of an atrial tachycardia (AT) after a pulmonary vein (PV) isolation of atrial fibrillation. The AT appeared to be a figure-of-eight reentrant AT by high-resolution mapping: one reentrant circuit rotated clockwise within the right PV (RPV) carina and the other rotated counterclockwise via two conduction gaps along the previous RPV isolation line. However, entrainment pacing from the carina and conduction gaps suggested that the AT was an intra-carina localized reentrant AT with a passive loop around the anterior RPV isolation line via those gaps. A radiofrequency application at the RPV carina terminated the AT.
一位 77 岁男性因心房颤动行肺静脉（PV）隔离后接受了心房心动过速（AT）的导管消融。高分辨率标测显示 AT 为 8 字形折返性心动过速：一个折返环在右 PV（RPV）嵴内顺时针旋转，另一个通过沿先前 RPV 隔离线的两个传导间隙逆时针旋转。然而，嵴部和传导间隙的拖带起搏提示 AT 是一种局灶性嵴内折返性心动过速，其通过这些间隙围绕前 RPV 隔离线形成一个被动环。在 RPV 嵴部应用射频消融终止了 AT。
