Maia I G, Cruz Filho F, Sá R, Alves P A
Hospital Pró-Cardíaco, Pró-Ritmo, Rio de Janeiro.
Arq Bras Cardiol. 1995 Apr;64(4):311-3.
To study by using the signal-averaged P wave, the atrial activation of patients with documented episodes of paroxysmal atrial fibrillation (PAF).
This study enrolled a total of 20 patients with documented episodes of paroxysmal atrial fibrillation (males 14; mean age 58.4 +/- 10.6 years). The signal-averaged P wave was recorded with a Corazonix Predictor II system. The total P wave duration was determined from the combined filtered x,y,z vector-magnitude and used for analysis. The results were compared with a normal group of 10 patients, matched in age.
In the control group, the total P wave duration ranged from 120.0 to 135.0 (mean = 128.3 +/- 5.8) ms. In the group of PAF, the total P wave duration ranged from 118.0 to 168.5 (mean = 151.5 +/- 13.7) ms (p < 0.000). Sixteen (80%) of this patients showed a P wave duration > 140.0 ms. With a cut < 140.0 ms for the normal atrial activation, the sensitivity was 76%, specificity was 100%, positive and negative predictive value were 100% and 60% respectively for the method detected patients with PAF.
Patients with PAF showed a prolonged signal-averaged P wave duration and should be differentiated by this method from the normal population.
通过使用信号平均P波，研究有阵发性心房颤动（PAF）发作记录的患者的心房激动情况。
本研究共纳入20例有阵发性心房颤动发作记录的患者（男性14例；平均年龄58.4±10.6岁）。使用Corazonix Predictor II系统记录信号平均P波。从组合滤波后的x、y、z向量幅值确定总P波持续时间并用于分析。将结果与10例年龄匹配的正常组患者进行比较。
对照组中，总P波持续时间为120.0至135.0（平均=128.3±5.8）毫秒。PAF组中，总P波持续时间为118.0至168.5（平均=151.5±13.7）毫秒（p<0.000）。该组16例（80%）患者的P波持续时间>140.0毫秒。对于正常心房激动，以<140.0毫秒为界值，该方法检测PAF患者的敏感性为76%，特异性为100%，阳性预测值和阴性预测值分别为100%和60%。
PAF患者的信号平均P波持续时间延长，可通过该方法与正常人群相鉴别。
