Abstract: Objective To evaluate clinical value of reciprocal ST-segment depression(RSTD) in patients with acute ST-segment elevation myocardial infarction(STEMI). Methods Data of a total of 318 patients with STEMI and undergoing percutaneous coronary artery angiography(CAG) were collected from January 2011 to January 2012. According to whether there was RSTD on the admission electrocardiogram(ECG), the patients were divided into RSTD group and non-RSTD group. All patients were investigated and evaluated for baseline characteristics and results of coronary artery angiography(CAG). Results The acute inferior myocardial infarction was more common in RSTD group. The patients exhibiting RSTD tended to have a lower systolic blood pressure(SBP), poorer left ventricular ejection fraction(LVEF), higher Killip classification, higher peak creatinekinase-MB(CK-MB) and troponin I(TnI), higher degree of ST segment elevation, higher incidence of atrial fibrillation, conduction block and cardiogenic shock, more multi-vessel diseases, the higher utilization rate of intra-aortic balloon pump(IABP) and the higher in-hospital mortality(P<0.05). Conclusion The STEMI patients with RSTD were in unstable hemodynamic status and had worse prognosis. ECG could be good to identify the high-risk patients, and to choose treatment options.

Key words: reciprocal ST-segment depression, acute ST-segment elevation myocardial infarction, percutaneous coronary intervention, electrocardiogram