Plotnick G D, Conti C R
Circulation. 1975 Jun;51(6):1015-9. doi: 10.1161/01.cir.51.6.1015.
The significance of the direction of the ST-segment shifts on the 12-lead electrocardiogram was evaluated in 82 consecutive patients with unstable angina. Eighteen patients with ST-segment elevation (group I) were compared with 64 patients with ST-segment depression (group II). There was no difference between group I and group II with regard to age, sex, or history of previous myocardial infarction. There also was no difference in the angiographic extent, location or severity of the coronary artery disease, collaterals, or resting hemodynamics. A larger proportion of patients in group I presented with recent onset angina. Life-threatening arrhythmias were more frequent in group I but were uncommon in both groups. A normal resting electrocardiogram was associated with normal ventricular function in both group I and group II but was associated with single vessel disease only in group I. An abnormal resting electrocardiogram was associated with multiple coronary vessel disease and abnormal ventricular function in both groups. Single vessel disease was encountered twice as frequently in group I but this difference was not statistically significant. Left main coronary artery disease was found only in group II.
在82例连续的不稳定型心绞痛患者中评估了12导联心电图上ST段移位方向的意义。18例ST段抬高患者（I组）与64例ST段压低患者（II组）进行了比较。I组和II组在年龄、性别或既往心肌梗死病史方面无差异。在冠状动脉疾病的血管造影范围、位置或严重程度、侧支循环或静息血流动力学方面也无差异。I组中近期发作心绞痛的患者比例更高。I组中危及生命的心律失常更常见，但两组中均不常见。静息心电图正常在I组和II组中均与心室功能正常相关，但仅在I组中与单支血管病变相关。静息心电图异常在两组中均与多支冠状动脉病变和心室功能异常相关。单支血管病变在I组中的发生率是II组的两倍，但这种差异无统计学意义。仅在II组中发现左主干冠状动脉疾病。
