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Chinese Journal of Medical Ultrasound (Electronic Edition) ›› 2023, Vol. 20 ›› Issue (04): 430-436. doi: 10.3877/cma.j.issn.1672-6448.2023.04.009

• Cardiovascular Ultrasound • Previous Articles     Next Articles

Evaluation of left ventricular systolic function and synchrony in advanced atrioventricular block patients with heart failure with preserved ejection fraction after left bundle branch area pacing by real-time three-dimensional echocardiography

Ying Li, Shaoqing Pan, Mingyan Ding, Dandan Sun, Haibo Qu, Peipei Hou, Fang Zhu()   

  1. Department of Cardiac Function, The People's Hospital of Liaoning Province, Shenyang 110016, China
    Department of Cardiology, The People's Hospital of Liaoning Province, Shenyang 110016, China
  • Received:2021-11-24 Online:2023-04-01 Published:2023-08-07
  • Contact: Fang Zhu

Abstract:

Objective

To evaluate the changes of left ventricular function and synchrony in advanced atrioventricular block (AAVB) patients with heart failure with preserved ejection fraction (HFpEF) after left bundle branch area pacing (LBBAP) using real-time three-dimensional echocardiography (RT-3DE).

Methods

A total of 45 AAVB patients with pacemaker implantation and LBBAP pacing at People's Hospital of Liaoning Province from December 2020 to August 2021 were enrolled. According to whether they were combined with HFpEF, the patients were divided into either an AAVB without HFpEF group (29 cases) or an AAVB with HFpEF group (16 cases). Echocardiography was used to obtain ultrasound parameters 3 days and 1 month after surgery, and RT-3DE was performed to obtain three-dimensional parameters, including left ventricular end diastolic volume (LVEDV), left ventricular end systolic volume (LVESV), left ventricular stroke volume (LVSV), left ventricular ejection fraction (LVEF), standard deviation of the minimum systolic volume time (Tmsv16-SD), and maximum time difference (Tmsv16-Dif) of the 16 segments of the left ventricle after heart rate correction. The improvement of left ventricular systolic function and synchronization between the two groups were compared 3 days and 1 month after surgery.

Results

Compared with the values obtained at 3 days after operation, LAD, LAVI, LVEDD, E, e', E/e', LVEDV, LVESV-3D, LVSV, LVEF, Tmsv-16-SD, and Tmsv16-Dif at 1 month after operation did not differ significantly in the AAVB without HFpEF group (P>0.05). Compared with the values obtained at 3 days after operation, LAD, LAVI, LVEDD, E, LVEDV, LVESV, LVSV, and LVEF at 1 month after operation did not differ significantly in the AAVB with HFpEF group (P>0.05), but e' increased significantly and E/e', Tmsv16-SD, and Tmsv16-Dif decreased significantly (P<0.05). Pearson correlation analysis showed that postoperative NT-proBNP levels at three days and one month after LBBBAP in AAVB patients were positively correlated with Tmsv16-SD and Tmsv16-Dif (r=0.395, P=0.032; r=0466, P=0.007).

Conclusion

As a new physiological pacing mode, LBBAP can effectively improve the left ventricular diastolic function and synchronization in patients with AAVB and HFpEF one month after surgery. The effect is more significant in AAVB patients with HFpEF than in those without.

Key words: Heart failure, Left bundle branch area pacing, Atrioventricular block, Three-dimensional echocardiography

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