Evaluation of the function and synchronization of left atrial in patients with paroxysmal atrial fibrillation by two dimensional speckle tracking imaging
10.3760/cma.j.issn.1004-4477.2013.03.004
- VernacularTitle:二维斑点追踪显像技术评价阵发性心房颤动患者左心房功能和同步性的研究
- Author:
Sheng CAO
;
Jinling CHEN
;
Qing ZHOU
;
Bo HU
;
Jia HUANG
;
Ruiqiang GUO
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Atrial fibrillation;
Atrial function,left;
Speckle tracking imaging
- From:
Chinese Journal of Ultrasonography
2013;(3):194-198
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the function and synchronization in patients with paroxysmal atrial fibrillation(PAF) by two dimensional speckle tracking imaging(2D-STI) measuring the strain of left atrial.Methods Thirty healthy controls and thirty-five patients with PAF were studied.The PAFs were divided into group PAF1 during the diapause and group PAF2 during the stage of attack.From the strain-time curve of 2D-STI workstation,the peak velocity(Vs,Ve and Va),the peak amplitude of longitudinal strain (Ss,Se and Sa) and strain rate (SRs,SRe and SRa) were acquired in the course of systole,the early and the late diastole respectively.The synchronization of left atrial (Ts-SD,Te-SD and Ta-SD) could be gotten from the time to the peak strain.The correlation were analysed between the synchronization indices and the strain rate parameters.Results ①No significant differences were found at the age,heart rate,E/A,IVS,LVEDD and LVEF.Compared with the control group,the LAD increased and DT decreased in PAF1 and PAF2 groups (P ＜0.05).②The peak velocity were slower,the peak strain were shorter and the peak strain rate were lessened in the PAFs than the controls(P ＜0.05),except the SRa(P ＞0.05).③The Ts-SD and Te-SD were much more different during the three groups(P ＜0.05),the PAF2 showed fewer synchronization; the Ta-SD was higher in the PAF1 than the controls(P ＜0.05).④The Ta-SD had a positive correlation with SRa(r =0.61,P ＜0.01).Conclusions The reservoir and conduit function of left atrial are impaired in PAFs during the diapause,the booster pump could recover partially,however,there are dyssynchronization.The booster pump function disappear during the stage of attack and there are worse synchronization.2D-STI may paly important roles in the assessment of function and synchronization of left atrial.
