不同射血分数患者非体外循环冠状动脉旁路移植术中右心功能变化

摘要

Objective To study the right ventricular (RV) function during off-pump coronary artery bypass graft COPCABG) surgery in patients with different ejection fraction(EF). Methods Fifty ASA E or DI patienis scheduled for OPCABG were randomly divided into two groups,group EF≥50% (n = 30), group EF≤35% (n = 20). A thermodilution pulmonary artery catheter was inserted after anesthesia induction. The values of CVP, mean pulmonary arterial pressure CMPAP), pulmonary arterial wedge pressure (PAWP), cardiac output index (CD, right ventricular ejection fraction (RVEF) and right ventricular end-diastolic volume index (RVEDVI) were measured at the points of immediate epicardium opening (baseline), 5 nun after the heart was positioned for each coronary anastomosis (Included left anterior descending( LAD) artery, left circumflex (LCX) artery, posterior descending artery (PDA)) and after the sternum closing. Results CVP. MPAP and PAWP increased during anastomoses of each coronary artery(P<0. 05). During anastomosis of the LCX artery and PDA, Cl and RVEF in both groups were significantly reduced(P<0. 05), RVEDVI in group EF≥50% decreased and increased in group EF≤35%(P<0. 05). Compared with group EF≤35%, RVEF in group EF≥50% increased significantly during anastomoses of LCX and PDA and after sternum closing, RVEDVI decreased during anastomoses of LCX and PDA(P<0. 05). Qmdusion The displacement of beating heart for positioning during anastomosis of the graft to I.CX artery and PDA caused significant derangement of RV function. The change of RV function was different in patients with different EF.%目的 研究不同射血分数患者非体外循环冠状动脉旁路移植术(OPCABG)术中右心功能变化规律.方法 选择50例择期行OPCABG的患者,ASAⅡ或Ⅲ级,其中EF≥50％组30例,EF≤35％组20例,麻醉诱导后放置肺动脉导管,分别记录开心包后(基础值)、前降支(LAD)搭桥、回旋支(LCX)搭桥、后降支(PDA)搭桥及关胸骨后的CVP、平均肺动脉压(MPAP)、肺动脉楔压(PAWP)、心脏指数(CI)、右室射血分数(RVEF)、右室舒张末容积指数(RVEDVI)等.结果 与基础值比较,LAD、LCX、PDA搭桥两组CVP、MPAP、PAWP明显升高(P＜0.05); LCX、PDA搭桥两组CI、RVEF明显降低(P＜0.05)；而EF≥50％组RVEDVI明显降低、EF≤35％组RVEDVI明显升高(P＜0.05).与EF≤35％组比较,LCX、PDA搭桥、关胸后EF≥50％组RVEF明显升高(P＜0.05)；而LCX、PDA搭桥EF≥50％组RVEDVI明显降低(P＜0.05).结论 在OPCABG术中行LCX和PDA搭桥期间可见右心功能受限,而不同射血分数患者之间右心功能变化规律有不同.