Assessment of left ventricular rotation by velocity vector imaging
- VernacularTitle:应用速度向量显像技术评价正常人及肥厚型心肌病患者的心肌扭转
- Author:
Haiyan CHEN
;
Xianhong SHU
;
Cuizhen PAN
;
Leilei CHENG
;
Lili DONG
;
Jie CUI
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Ventricular function,left;
Cardiomyopathies,hypertrophy;
Tortion;
Velocity vector imaging
- From:
Chinese Journal of Ultrasonography
2008;17(3):193-196
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate left ventricular rotation in heahhy subj ects and patients with hypertrophy cardiomyopathy(HCM). Methods Twenty-five healthy subjects and 41 patients with HCM were enrolled. Two-dimensional standard echocardiography were performed and analyzed using Siemens Sequoia C512 system and velocity vector imaging 2.0 version. Left ventricular end diastollc volume(EDV).end systolic volume(ESV),left ventricular ejection fraction(LVEF),systolic peak rotation velockv and displacement of endocardium and epicardium of basal and apical part of left ventricle were measured.Difference of basal and apical rotation velocity and displacement between endoeardium and eDicardium(DVbase,DVape,DDbase,DDape) were calculated. Results Left ventricle rotated clockwise at basal part and counterclockwise at apex during systole. It rotated stronger at apex(P＜0.05 or P＜0.001)than at basal part and stronger in endocardium than in epicardium(P＜0.01 or P＜0.001). The rotation velocitv time curve consisted of a peak during systole and two peak during diastole,while the rotation displacementtime curve was composed of a smaller diastolic peak and a larger systolic peak. There was asvmmetricalhypertrophy at the basal part of HCM patients,and DVbase and DDbase were significantly increased(P＜0.01 or P＜0.001) in the significant hypertrophy segment. Conclusions Velocity vector imaging can assess left ventricular rotation effectively. HCM patients acquire mismatch of endocardium and epicardiuIn rotation.
