Bateman J R, Siegler D, Wagstaff D, Clarke S W
Thorax. 1980 May;35(5):355-8. doi: 10.1136/thx.35.5.355.
Serial electrocardiographs (ECG) and vectorcardiographs (VCG) have been performed on 10 patients admitted to hospital in status asthmaticus on 12 separate occasions. The VCG was more efficient than the ECG in the detection of right atrial and ventricular enlargement. Both investigations were equally reliable in recording changes in frontal plane P wave axis. The mean frontal plane P wave axis fell from +60 degrees (range +35 degrees to +90 degrees) on the day of admission to +43 degrees (range +30 degrees to +60 degrees) at the time of discharge. The mean FEV1 expressed as a percentage of predicted values increased from 48% (range 25% to 81%) to 87% (range 44% to 123%). In direct contrast to previous studies the presence of an abnormally vertical frontal plane P wave axis (> 60 degrees) was related to the severity of airway obstruction (p < 0.01).
对10例因哮喘持续状态入院的患者，在12个不同时间点进行了系列心电图（ECG）和向量心电图（VCG）检查。在检测右心房和心室扩大方面，VCG比ECG更有效。在记录额面P波轴的变化方面，两项检查同样可靠。平均额面P波轴从入院当天的+60度（范围为+35度至+90度）降至出院时的+43度（范围为+30度至+60度）。以预测值的百分比表示的平均第一秒用力呼气容积（FEV1）从48%（范围为25%至81%）增加到87%（范围为44%至123%）。与先前的研究形成直接对比的是，异常垂直的额面P波轴（>60度）的存在与气道阻塞的严重程度相关（p<0.01）。
