Assessment of left ventricular systolic synchrony before and after percutaneous transluminal septal myocardial ablation of hypertrophic obstructive cardiomyopathy by two dimensional speckle tracking imaging
10.3760/cma.j.issn.1004-4477.2012.02.005
- VernacularTitle:斑点追踪技术评价肥厚型梗阻性心肌病化学消融术前后左心室收缩同步性的研究
- Author:
Hailin TANG
;
Bowen ZHAO
;
Guosheng FU
;
Bei WANG
;
Peng LI
;
Lilong XU
;
Ran CHEN
;
Li XIONG
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Cardiomyopathy,hypertrophic;
Catheter ablation;
Ventricular function,left;
Speckle tracking imaging
- From:
Chinese Journal of Ultrasonography
2012;21(2):108-111
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo assess the characteristics of left ventrlcular ( LV) systolic syncnrony before and 6 days after percutaneous transluminal septal myocardial ablation(PTSMA)in patients with hypertrophic obstructive cardiomyopathy (HOCM) using two dimensional speckle tracking imaging(2DSTI),and to investigate correlation between the LV systolic synchrony and LV outflow-trace gradient (LVOTG).MethodsLVOTG were measured before and 6 days after PTSMA in 21 patients with HOCM.The two dimensional loop-cinec were obtained in three levels of the short axis views of LV (mitral valve,papillary muscle and cardiac apex).The time from the onset of QRS complexes to systolic peak strain from the radial vectors (TRs) was recorded using 2D-STI.The standard deviation of the TRS of 18 segments (TRsSD) were calculated as indicator of LV systolic synchrony.Results Six days after PTSMA,LVOTG decreased significantly from (84.3 ± 19.1)mm Hg to (40.6 ± 8.3)mm Hg( P ＜0.01).TRS of the base and middle segments of anteroseptal were prolonged dramatically( P ＜0.05) 6 days after PTSMA compared with that before.There were no significantly differences in TRs-SD of LV between before and 6 days after PTSMA ( t =1.03,P ＞ 0.05).Decreased LVOTG correlated moderately to prolonged TRS of the base segments of anteroseptal ( r =0.657,P ＜0.05).Conclusions2D-STI can detect exactly the characteristics of LV systolic synchrony before and 6 days after PTSMA in patients with HOCM.
