心肌梗死后心力衰竭患者经不同剂量培哚普利治疗后心肌能量消耗水平的变化

摘要

目的 探讨心肌梗死后心力衰竭患者给予不同剂量培哚普利治疗12个月后经无创超声心动图评估的心脏结构指标及心肌能量消耗(MEE)水平变化及其意义.方法 选取心肌梗死后不同程度心力衰竭患者63例,分别给予培哚普利治疗,根据长期口服剂量水平分为常规剂量组(N,培哚普利4 mg)和靶剂量组(H,培哚普利8 mg).治疗前及治疗12个月后分别用多普勒成像技术测量心脏结构指标、左室收缩功能指标(左室短轴缩短率LVFS,左室射血分数LVEF),计算左室收缩末周向室壁应力(cESS)、MEE.入组前及治疗后分别于清晨采集外周静脉血,检测NT-proBNP及血肌酐.结果 治疗前两组间各指标比较差异均无统计学意义(P＞0.05).治疗后两组间比较,N组心脏结构指标(主动脉内径AD、左室收缩末期内径LVIDs、左室质量指数LVMI、左房内径LA)、心肌能量消耗指标(cESS、MEE)及lgNT-proBNP大于H组,收缩功能指标(LVFS、LVEF)低于H组,差异具有统计学意义(P＜0.05).与治疗前比较,H组治疗后心脏结构指标、心肌能量消耗指标及lgNT-proBNP均明显降低,收缩功能指标明显升高；N组治疗后与治疗前比较,除PWTs、LVFS外其他各指标间变化均有统计学意义(P＜0.05).双变量相关分析显示,MEE与lgNT-proBNP呈正相关关系(P＜0.01).结论 心肌梗死后心力衰竭患者经过12个月不同剂量培哚普利治疗,均抑制了心肌重构,改善了左室收缩功能,降低了NT-proBNP及心肌能量消耗水平；高剂量培哚普利治疗较低剂量能更明显地抑制心肌重构,改善左室收缩功能,降低NT-proBNP及心肌能量消耗水平.%Objective To investigate the changes of myocardial energy expenditure in patients with heart failure following myocardial infarction after treatment with different doses of perindopril. Methods Sixty-three patients with heart failure after myocardial infarction were treated with perindopril for 12 months at the doses of 4 mg (group N) and 8 mg (group H). Doppler imaging was used to measure the structural and systolic functional parameters before and after the treatment, and the circumferential end-systolic wall stress (cESS) and myocardial energy expenditure (MEE) were calculated. The biochemical indicators including serum creatinine and plasma NT-proBNP were detected before and after the treatment. Results The two groups had similar measurements before treatment. After 12 months of perindopril treatment, the patients in group N showed higher LA, LV, RA, RV, LVIDs, AD, cESS, lgNT-proBNP, and MEE with lower LVFS and LVEF than those in group H. Compared to those before treatment, LVFS and LVEF were increased and LA, LV, RA, RV, AD, LVIDs, LVMI, lgNT-proBNP and MEEm lowered after the 12-month treatment in group H. Significant changes were also found in the measured parameters except for PWTs, LVET, LVSV and LVFS in group N after the treatment. Bivariate analysis showed a significant positive correlation between MEE and lgNT-proBNP (r=0.513, P<0.01). Conclusion A 12-month treatment with perindopril can suppress myocardial remodeling, improve left ventricular systolic function, and lower NT-proBNP and myocardial energy expenditure in patients with heart failure after myocardial infarction, and a higher dose can produce better results.