Effects of left ventricular reconstruction on magnetic resonance imaging derived left ventricular wall stress and contractive function in patients with postinfarction ventricular aneurysm
10.3760/cma.j.issn.0253-3758.2010.02.004
- VernacularTitle:磁共振评估室壁瘤患者手术后室壁应力及收缩功能的变化
- Author:
Hong-Guang FAN
1
;
Wei FENG
;
Zhe ZHENG
;
Yan ZHANG
;
Shi-Hua ZHAO
;
Sheng-Shou HU
Author Information
1. 北京协和医学院,中国医学科学院,阜外心血管病医院
- Keywords:
Magnetic resonance imaging;
Heart aneurysm;
Cardiac surgical procedures
- From:
Chinese Journal of Cardiology
2010;38(2):108-111
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the effects of left ventricular reconstruction on left ventricular wall stress and function in patients with postinfarction left ventricular aneurysm.Methods During January 2005 to June 2006,16 patients[15 male,(56.6±8.8)years]with postinfarction ventricular aneurysm received left ventricular reconstruction operation on CPB(5 linear repair,6 endoventricular purse-string suture,5 endoventricular patch repair)and CABG was also performed in 15 patients.MRI examination was made before and 3 months post operation by Siemens Magnetom Avanto 1.5T MR with routine cine-MRI in combination with late-delayed enhancement sequence.Left ventricular geometric parameters and segmental thickening were obtained with accessory image analysis software.Non-invasive blood pressure was acquired in order to compute ventricular wall stress.The revascularized and unrevascularized segments were defined by comparing the post operation revascularization of the blood-supply coronary artery with preoperative results.Results A total of 192 segments including 74 unrevascularized segments were analyze & Segmental thickening were significantly increased while wall stress were significantly reduced in both unrevascularized and revascularized segments 3 months post operation compared to preoperative values(all P＜0.05).The increase of wall thickening was positively correlated with the reduction of wall stress in these segments.Condusion Left ventricular reconstruction plus CABG is associated with reduced Ieft ventricular wall stress and increased myocardial contractive function in patients with postinfarction left ventricular aneurysm
