Marconi P, Castelli G, Montereggi A, Marioni C
Cardiologia San Luca, Ospedale di Careggi, Firenze.
G Ital Cardiol. 1991 Oct;21(10):1075-81.
The aim of this study was to verify the utility of the signal averaged electrocardiogram for the analysis of the P wave in patients with paroxysmal lone atrial fibrillation. We studied 22 patients with documented paroxysmal atrial fibrillation without cardiovascular or endocrine diseases. The results were compared with 24 normal subjects. Signal averaged electrocardiogram was recorded from bipolar orthogonal leads X, Y, Z using ART equipment mod. 1200 EPX, with 50-250 Hz filter and effective time-base resolution of 100 mm/sec and voltage of 1 mm/microV. Signal averaging of at least 300 beats was performed to reduce noise level under 0.3 microV. In patients with atrial fibrillation the duration of the P wave was significantly longer (135.0 +/- 13.0 msec) than in the normal subjects (109.4 +/- 11.4 msec) (p less than 0.000001). These results were steady in successive recordings (2-30 days after the first recording). The analysis of the P wave signal averaging seems useful in identifying patients with lone paroxysmal atrial fibrillation.
本研究的目的是验证信号平均心电图用于分析阵发性孤立性心房颤动患者P波的效用。我们研究了22例有阵发性心房颤动记录且无心血管或内分泌疾病的患者。将结果与24名正常受试者进行比较。使用型号为1200 EPX的ART设备从双极正交导联X、Y、Z记录信号平均心电图，采用50 - 250 Hz滤波器，有效时基分辨率为100 mm/秒，电压为1 mm/微伏。进行至少300次心搏的信号平均以将噪声水平降低至0.3微伏以下。心房颤动患者的P波时限（135.0±13.0毫秒）显著长于正常受试者（109.4±11.4毫秒）（p＜0.000001）。这些结果在连续记录中（首次记录后2 - 30天）保持稳定。P波信号平均分析似乎有助于识别孤立性阵发性心房颤动患者。
