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著者分析伦敦医院50名经二尖瓣分离术后患者的心房心电图改变,研究它们在指示术后预后上的价值。作者采用CR导联,而不是胸导联,以给予一个加大的P波电压。测量CR_1中P波的第一峰,以指示右房的活动;而根据CR_7中P波的第二峰指示左房的活动。术前在CR_7中常可见到一个深的Ta波。心电图记录于术前即时、术后7到10天和以后每隔1至2年,一直持续到术后4至8年。此外,病人的心电图还与60例正常心电图作此较,后者右房波平均高度为0.9毫米,平均时间是
The authors analyzed changes in atrial electrocardiograms in 50 patients at post-mitral valve surgery in London Hospitals to study their value in indicating postoperative prognosis. The authors used a CR lead instead of a chest lead to give an increased P-wave voltage. The first peak of P wave in CR_1 is measured to indicate right atrium activity and the second peak of P wave in CR_7 is indicative of left atrium activity. A deep Ta wave can often be seen in CR_7 before surgery. ECG recorded in the preoperative, 7 to 10 days and after every 1 to 2 years, until 4 to 8 years after surgery. In addition, the patient’s ECG is compared with 60 cases of normal ECG, the average height of the right atrial wave is 0.9 mm, the average time is