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Chinese Journal of Medical Ultrasound (Electronic Edition) ›› 2022, Vol. 19 ›› Issue (06): 535-540. doi: 10.3877/cma.j.issn.1672-6448.2022.06.008

• Cardiovascular Ultrasound • Previous Articles     Next Articles

Evaluation of left ventricular function and mechanical dispersion by two-dimensional speckle tracking echocardiography in patients with paroxysmal atrial fibrillation

Yuanzhi Li1, Yidan Li1, Xueyan Ding1, Dichen Guo1, Xiaoguang Ye1, Jiangtao Wang2, Xiuzhang Lyu1,()   

  1. 1. Department of Echocardiography, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
    2. General Electric Medical System (China), Beijing 100176, China
  • Received:2020-11-23 Online:2022-06-01 Published:2022-06-16
  • Contact: Xiuzhang Lyu

Abstract:

Objective

To evaluate the left ventricular function and mechanical dispersion (MD) by two-dimensional speckle tracking echocardiography (2D-STE) in patients with paroxysmal atrial fibrillation (PAF).

Methods

Thirty-seven patients with PAF and 29 controls were selected at the Department of Cardiology of Beijing Chaoyang Hospital Affiliated to Capital Medical University. All subjects underwent transthoracic echocardiography, and two-dimensional ultrasound parameters were routinely measured. Dynamic images of left ventricular apical four-chamber, two-chamber, and three-chamber views were collected as well. EchoPAC 203 software was used to measure the left ventricular myocardium global longitudinal strain (GLS) and longitudinal strain of each segment, and the MD was expressed by the standard deviation of the peak time of each segment. The differences in each parameter between the two groups were analyzed statistically.

Results

Left atrial diameter (LAD), left atrial volume index (LAVI), left ventricular end-diastolic diameter (LVDd), left ventricular end-systolic diameter (LVSd), inter-ventricular septal thickness (IVST), and left ventricular posterior wall thickness (LVPWT) were larger, and left ventricular ejection fraction (LVEF) [(59.3±4.7)% vs (63.3±4.0)%] was less in the PAF group than in the control group (P<0.05 for all). There was no significant difference in the ratio of mitral peak velocity to mitral annulus peak velocity (E/e') between the two groups (P>0.05).Compared with the controls, the absolute value of GLS was decreased [(-17.9±2.3)% vs (-20.7±1.7)%] and MD was increased [(59.3±19.6) ms vs (43.0±10.2) ms] in PAF patients. In addition, PAF patients with a normal LA size exhibited significantly lower GLS and increased MD compared with controls (P<0.05).

Conclusion

2D-STE can provide valuable information for the evaluation of early impaired left ventricular systolic function in PAF patients, thus providing a reliable basis for early intervention and clinical strategies for them.

Key words: Speckle tracking echocardiography, Atrial fibrillation, Left ventricular function, Mechanical dispersion

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