Single lead ST-segment resolution in acute anterior ST-elevation myocardial infarction after primary percutaneous coronary intervention:prognostic impact

Abstract

Objective To evaluate the prognostic value of ST-segment resolution (STR) measured in a single electrocardiography lead obtained early after primary pereutaneous coronary intervention (PCI)in patients with acute anterior ST-elevation myocardial infarction (STEMI). Methods STR, major adverse cardiac event(MACE) and factors contributed to STR were analyzed retrospectively in 42 patients underwent primary PCI post STEMI. The coronary arteriography, medication and MACE were compared between the STR group (31 cases) and the non-STR group (11 cases). Results The ratio of diabetes in the non-STR group was higher(10/11) than that in the STR group(7/31), but left ventricular ejection fraction [(48.2 ±10.1)%]was lower than that in the STR group [(54.6 ± 9.7)%], there were significant difference between the two groups (P < 0.05). The coronary artery thrombosis, TIMI grade 0-1 preoperation, TIMI grade ≤2 postoperation, the ratio of MACE in the non-STR group was higher than those in the STR group, onste to sacculus proprius opened was longer than that in the STR group, there were significant difference between the two groups (P < 0.05). Conclusions STR obtained in a single electrocardiography lead is an easy and important prognosticator of MACE post PCI in patients with STEMI. It can be used to identify high-risk anterior STEMI patients post primary PCI, and support some ways use in high-risk STEMI undergoing reperfusion. Key words: Myocardial infarction; Angioplasty,transluminal,percutaneous coronary; Electrocardiography