THE MEASUREMENT OF THE Q-T-INTERVAL OF THE ELECTROCARDIOGRAM
THE MEASUREMENT OF THE Q-T-INTERVAL OF THE ELECTROCARDIOGRAM
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DOI：
10.1161/01.cir.6.3.378
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发表时间：
1952-01-01
期刊：
影响因子：
37.8
通讯作者：
SURAWICZ, B
中科院分区：
文献类型：
--
作者：
LEPESCHKIN, E;SURAWICZ, B
分析了Q-T间期测量中QRS起点和T终点的误差来源。一个重要的错误是混淆了升高的U波和T波，导致Q-T延长的诊断。在这种情况下，一些心前区导联通常在T和U之间显示一个切迹或扭结，这表明大约是T的末端。如果使用这些标准，在无低钙血症的低钾血症中，真实的校正Q-T持续时间不会延长，而是正常或缩短，对应于第二心音的较早出现。
The sources of error in determination of the beginning of QRS and the end of T during measurement of the Q-T duration are analyzed. An important error is confusion of an elevated U wave with the T wave, resulting in the diagnosis of a prolonged Q-T. In such cases, some of the precordial leads usually show a notch or kink between T and U which indicates approximately the end of T. If these criteria are used, the true corrected Q-T duration in hypopotassemia without hypocalcemia is not prolonged, but normal or shortened, corresponding to an earlier appearance of the second heart sound.