Karaca Mustafa, Kinay Ozan, Nazli Cem, Biceroglu Serdar, Vatansever Fahriye, Ergene A Oktay
Cardiology Department, Atakalp Heart Center, No: 16 Kahramanlar, Izmir, Turkey.
Echocardiography. 2007 Sep;24(8):810-5. doi: 10.1111/j.1540-8175.2007.00483.x.
Recurrence of atrial fibrillation is more common in patients with atrial conduction delay. In the present study, we evaluated whether findings obtained from transesophageal echocardiography (TEE), a semi-invasive method, correlate with those from an invasive method, electrophysiologic study (EPS), in measuring interatrial conduction time.
We compared two methods of calculating interatrial conduction time in a group of 33 patients. The origin of the P-wave on the surface electrocardiogram (ECG) was taken as the onset of atrial activation. The time interval from this point to the commencement of the left atrial appendage ejection flow (P-LAA) was measured by TEE. Meanwhile, simultaneous recordings of the left atrial appendage were obtained with a catheter positioned in the LAA, and an invasive interatrial conduction time was measured from the origin of the surface's earliest P-wave (I-IACT). The mean I-IACT (46.27 +/- 13.25 ms) correlated strongly with the mean P-LAA (49.91 +/- 12.72 ms; r = 0.839, P < 0.0001).
The interatrial conduction time can be estimated with a relatively noninvasive method using P-LAA measurements. This technique can be applied widely in predicting AF recurrence, and appropriate therapy may be applied.
心房颤动复发在伴有心房传导延迟的患者中更为常见。在本研究中，我们评估了经食管超声心动图（TEE）（一种半侵入性方法）所获得的结果与侵入性方法电生理研究（EPS）在测量房间传导时间方面的结果是否相关。
我们在一组33例患者中比较了两种计算房间传导时间的方法。体表心电图（ECG）上P波的起点被视为心房激动的起始点。通过TEE测量从该点到左心耳射血血流开始（P-LAA）的时间间隔。同时，将导管置于左心耳以同步记录左心耳情况，并从体表最早P波起点测量侵入性房间传导时间（I-IACT）。平均I-IACT（46.27±13.25毫秒）与平均P-LAA（49.91±12.72毫秒；r = 0.839，P < 0.0001）密切相关。
使用P-LAA测量可以通过一种相对非侵入性的方法来估计房间传导时间。该技术可广泛应用于预测房颤复发，并可应用适当的治疗方法。
