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目的观察心房颤动(简称房颤)导管消融过程中同一肺静脉发生缓慢性和快速性肺静脉电位共存的现象并分析其可能的机制。方法分析5例持续性房颤患者单Lasso电极标测的心内电图,以及记录消融导致肺静脉电位分层和隔离的部位。结果在房颤消融过程中,1例在右下肺静脉内记录到两种不同的肺静脉电位节律,电位分层以及隔离靶点分别为环肺静脉消融线径的右后下壁和右后上壁近房顶处;4例在左上肺静脉内记录到两种不同的肺静脉电位节律,电位分层以及隔离靶点分别为环肺静脉消融线径的左前下壁和左前上壁。结论同一肺静脉发生缓慢性和快速性肺静脉电位共存现象的原因可能系邻近肺静脉间存在电学连接,亦可能与邻近肺静脉远场电位有关。
Objective To observe the coexistence of slow and rapid pulmonary venous potential in the same pulmonary vein during catheter ablation of atrial fibrillation (AF) and to analyze its possible mechanism. Methods The electrocardiogram (ECG) measured by single Lasso electrode in 5 patients with persistent AF and the site of segregation and isolation of pulmonary vein potential recorded by ablation were recorded. Results During the ablation of atrial fibrillation, one case recorded two different rhythm of pulmonary venous potential in the right lower pulmonary vein. The potential stratification and isolation targets were the right posterior inferior wall and the posterior superior wall near the ablation diameter 4 cases were recorded in the left upper pulmonary vein recorded two different rhythm of the pulmonary venous potential, potential stratification and isolation of the anteroposterior pulmonary vein ablation diameter of the left anterior inferior wall and left anterior wall. Conclusions The reason for the coexistence of slow and rapid pulmonary venous potential in the same pulmonary vein may be related to the electrical connection between adjacent pulmonary veins or the adjacent far-field potential of pulmonary veins.