扩张性心肌病患者内皮依赖性和内皮非依赖性血管舒张功能受损的研究

Endothelium-dependent and -independent Functions are Impaired in Patients With Dilated Cardiomyopathy

目的 研究扩张性心肌病 (扩心病 )患者内皮依赖性 (简称血管内皮功能 )和内皮非依赖性血管舒张功能是否受损。方法 采用高分辨血管外超声法测定 40例扩心病患者和 42例无扩心病对照组肱动脉血流介导的血管内皮功能和舌下含服硝酸甘油( 0 5mg)后内皮非依赖性血管舒张功能。结果 扩心病患者血流介导性的肱动脉舒张 [( 2 3 2± 2 10 ) % ]较对照组 [( 7 87± 4 15 ) % ]明显降低 (P <0 0 1) ,含服硝酸甘油后的肱动脉舒张 [( 16 89± 11 5 7) % ]也较对照组 [( 2 2 83± 6 93 ) % ]明显受损 (P <0 0 5 )。

Objective To investigate whether endothelial function was impaired in patients with dilated cardiomyopathy(DC). Methods Flow mediated dilation (FMD) and nitroglycerin mediated dilation (NMD) were measured using high-resolution ultrasound technique in 40 patients with DC and 42 controls without DC.Results In patients with dilated cardiomyopathy, FMD as well as NMD were much reduced compared with controls [(2 32±2 10)% vs(7 87±4 15)%,P<0 01 and (16 89±11 57)% vs(22 83±6 93)% ,P<0 05 respectively].Conclusions This study indicates both endothelium- dependent and -independent vasodilatation functions are impaired in patients with dilated cardiomyopathy.