https://scholars.lib.ntu.edu.tw/handle/123456789/192637
標題: | P Wave Separation after Atrial Compartment Operation for Atrial Fibrillation | 作者: | LO, HUEY-MING LIN, FANG-YUE TSENG, YUNG -ZU |
關鍵字: | atrial fibrillation;P wave;surgery | 公開日期: | 2004 | 卷: | v.27 | 期: | n.4 | 起(迄)頁: | 547-550 | 來源出版物: | PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY | 摘要: | LO, H-M., ET AL.: P Wave Separation After Atrial Compartment Operation for Atrial Fibrillation. Surgically induced abnormalities in atrial conduction could result in unusual P wove changes. A 31-year-old woman underwent concomitant mitral valve surgery and atrial compartment operation for mitral stenosis and atrial fibrillation (AF). After operation, the AF was successfully converted to sinus rhythm , whereas an unusual electrocardiogram (ECG,) with a discrete negative deflection before the T wove in V-1 was noted. Electrophysiological study showed a marked conduction delay from the high right atrium (HRA) to the right atrial appendage (RAA) compartment, which resulted in a separation of P waves. The P wove preceding the QRS complex represented the activation of sinus node and the left atrial compartments, and the P at the vicinity of T wave represented the activation of RAA compartment. The conduction from HRA to RAA was worsened on HRA pacing at a faster rate, and improved after isoproterenol infusion. This report demonstrated that conduction across a surgically created isthmus in the atrium could be severely impaired and result in unusual P wave separation. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/96339 |
顯示於: | 醫學系 |
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