急性ST段抬高型心肌梗死直接PCI术后ST段回落的临床研究

目的：通过观察急性ST段抬高型心肌梗塞（STEMI）直接经皮冠状动脉介入治疗（PCI）术后,梗塞相关动脉（IRA）达心肌梗塞溶栓（TIMI）血流3级患者心电图ST段回落程度,探讨ST段回落与心肌损伤及心脏收缩功能的关系。方法：选择在发病12h内接受直接PCI治疗后TIMI血流达到3级的STEMI患者115例,PCI术前、术后行心电图检查,观察ST段回落情况,术前、后测定患者肌酸激酶（CK）、肌酸激酶同工酶（CK-MB）及肌钙蛋白T（cTnT）,术后测定左室射血分数（LVEF）;按照ST段回落幅度（∑STR）不同,患者被分为两组：A组：∑STR〈50%,21例,为心肌灌注不良组,B组：∑STD≥50%,94例,为心肌灌注良好组;分析两组患者ST段回落程度与CK、CK-MB、cTnT及LVEF的关系。结果：（1）两组患者IRA部位、病变血管支数,PCI治疗前TIMI血流分级、cTnT水平,发病到PCI时间等差异均无显著性（P〉0.05）;（2）两组患者术前、后CK、CK-MB水平差异无显著性（P〉0.05）;（3）术后A组cTnT水平明显高于B组[（1.30±0.43）μg/L∶（1.0±0.45）μg/L,P〈0.05];（4）术后A组LVEF明显低于B组[（44.13±4.83）%∶（47.93±5.23）%,P〈0.05]。结论：急性ST段抬高型心肌梗塞直接PCI术后,TIMI血流达到3级,ST段回落良好的患者,心肌组织水平灌注程度较好,心肌损伤程度轻,左心收缩功能较好。

Study of ST segment resolution after direct percutaneous coronary intervention in patients with ST elevation myocardial infarction

Objective:To observe the correlation among ST segment resolution by electrocardiogram(ECG) after direct percutaneous coronary intervention(PCI) and myocardial damage,heart function in patients with acute ST elevation myocardial infarction(STEMI) and infarction relate artery(IRA) blood flow reached TIMI flow grade 3.Methods:A total of 115 STEMI patients with TIMI flow grade 3 after direct PCI within 12h were enrolled in the study.The ECG,levels of creatine kinase(CK),CK-MB and cardiac troponin T(cTnT) were e...