Gasparini M, Ciliberto G R, Visigalli M, Pioselli D
G Ital Cardiol. 1984 Apr;14(4):265-8.
We report hereby the case of a 20-year-old woman, whose electrocardiogram showed unusual repolarization abnormalities 36 hours after open heart surgery. They were due to pure hypocalcemia (7,1 mg/100 ml) secondary to extracorporeal circulation, were sudden in onset, transient, variable within a few minutes, and immediately suppressed by intravenous calcium chloride. Some of the changes were similar to those already reported in literature (lengthening of QT and ST segments, changes in T wave voltage but not duration) whereas other were quite unusual i.e. the extreme variability and transientness of these changes, the marked ST level alterations and the presence of wide and diphasic U waves. Intravenous administration of 2 g of calcium chloride was followed by immediate and complete normalization of the electrocardiographic tracing.
在此，我们报告一例20岁女性病例，其在心脏直视手术后36小时，心电图显示出异常的复极异常。这些异常是由于体外循环继发的单纯低钙血症（7.1毫克/100毫升）所致，起病突然，呈一过性，在几分钟内变化不定，并通过静脉注射氯化钙立即得到缓解。其中一些变化与文献中已报道的相似（QT和ST段延长、T波电压改变但时限未变），而其他一些则非常不寻常，即这些变化的极端变异性和一过性、显著的ST段水平改变以及宽而双相的U波的出现。静脉注射2克氯化钙后，心电图立即完全恢复正常。
