Abstract：
The aim of this study is to assess alterations in heart function and structure in patients diagnosed with non-ST segment elevation acute myocardial infarction (NSTEAMI), unstable angina (UA), and stable angina (SA) 1 year after undergoing off-pump coronary artery bypass grafting (OPCABG) performed without extracorporeal circulation. A total of 182 patients who underwent OPCABG were included and classified into 3 groups based on their preoperative diagnosis: the NSTEAMI group (n = 68), the UA group (n = 64), and the SA group (n = 50). Cardiac ultrasonography data were collected for all groups both preoperatively and 1 year postoperatively. Clinical data were subjected to statistical analysis. In the NSTEAMI group, postoperative observations revealed increases in left ventricular stroke volume and left ventricular end-systolic diameter, along with reductions in left ventricular end-diastolic volume (LVEDV) and left ventricular end-diastolic diameter (LVEDD) 1-year post-surgery. The UA group demonstrated decreases in LVEDV and LVEDD 1-year post-surgery. Similarly, the SA group exhibited an increase in left ventricular ejection fraction (LVEF) and reductions in LVEDV and LVEDD 1-year post-surgery. Comparative analysis of cardiac ultrasonography data revealed that the NSTEAMI group displayed significantly lower left ventricular stroke volume and notably higher left ventricular end-systolic diameter and volume compared to the UA and SA groups 1-year post-surgery. Furthermore, the SA group exhibited significantly elevated LVEF compared to the UA and NSTEAMI groups 1-year post-surgery. Cardiac ultrasonography findings indicate that all 3 groups exhibited improvements in cardiac function and left ventricular structure 1-year post-surgery. However, the NSTEAMI group demonstrated more substantial improvements in comparison to the UA and SA groups.
摘要：
这项研究的目的是评估诊断为非ST段抬高急性心肌梗死（NSTEAMI）的患者心脏功能和结构的变化。不稳定型心绞痛(UA),在不进行体外循环的非体外循环冠状动脉旁路移植术（OPCABG）后1年和稳定型心绞痛（SA）。共纳入182例接受OPCABG的患者，并根据其术前诊断分为3组：NSTEAMI组（n=68），UA组(n=64)，和SA组(n=50)。术前和术后1年收集所有组的心脏超声检查数据。对临床数据进行统计分析。在NSTEAMI组中，术后观察显示左心室每搏量和左心室收缩末期直径增加，术后1年左心室舒张末期容积（LVEDV）和左心室舒张末期内径（LVEDD）减少。UA组术后1年显示LVEDV和LVEDD降低。同样，SA组术后1年左心室射血分数(LVEF)升高,LVEDV和LVEDD降低.心脏超声数据的比较分析显示，与UA和SA组相比，NSTEAMI组的左心室每搏输出量明显较低，左心室收缩末期直径和体积明显较高。此外，与UA和NSTEAMI组相比,SA组术后1年LVEF显著升高.心脏超声检查结果表明，所有3组术后1年心功能和左心室结构均得到改善。然而,与UA和SA组相比,NSTEAMI组表现出更显著的改善.
