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Chinese Journal of Medical Ultrasound (Electronic Edition) ›› 2025, Vol. 22 ›› Issue (12): 1097-1105. doi: 10.3877/cma.j.issn.1672-6448.2025.12.001

• Cardiovascular Ultrasound •    

Four-dimensional automatic left atrial quantification technology for evaluating left atrial structure and function in patients with heart failure with preserved ejection fraction complicated by paroxysmal atrial fibrillation

Xin Hu1, Danke Ma1, Manman Yang1, Shoujing Wang1, Cunying Cui2, Lin Liu1, Chengzeng Wang1,()   

  1. 1 Department of Ultrasound, the First Affiliated of Zhengzhou University, Henan Key Laboratory of Chronic Disease Prevention and Therapy & Intelligent Health Management, Zhengzhou 450052, China
    2 Department of Ultrasound, Fuwai Central China Cardiovascular Hospital of Zhengzhou University, Zhengzhou 451464, China
  • Received:2025-10-29 Online:2025-12-01 Published:2026-04-03
  • Contact: Chengzeng Wang

Abstract:

Objective

To evaluate left atrial structure and function in patients with heart failure with preserved ejection fraction (HFpEF) complicated by paroxysmal atrial fibrillation (AF) using four-dimensional automated left atrial quantification (4D Auto LAQ) technology, and to explore the correlation between LA remodeling and AF in HFpEF patients.

Methods

A total of 109 HFpEF patients admitted to the First Affiliated Hospital of Zhengzhou University from December 2023 to December 2024 were enrolled and divided into a paroxysmal AF group (n=40) and a non-AF group (n=69). Clinical data were collected, and echocardiographic parameters (2D, color Doppler, and tissue Doppler) were measured. 4D Auto LAQ was applied to obtain LA volumetric and strain parameters [left atrial minimum volume (LAVmin), left atrial maximum volume index (LAVImax), left atrial pre-systolic volume (LAVpreA), left atrial stroke volume (LAEV), left atrial total ejection fraction (LAEF), left atrial systolic longitudinal and circumferential strain (LASr/LASr-c), left atrial pipeline longitudinal and circumferential strain (LAScd/LAScd-c), and left atrial systolic longitudinal and circumferential strain (LASct/LASct-c)]. Differences in these parameters between the two groups were assessed using the t-test. Receiver operating characteristic (ROC) curve analysis was performed to assess the overall diagnostic efficacy of left atrial parameters for HFpEF combined with paroxysmal AF and calculate the optimal cut-off value. Logistic regression analysis was utilized to analyze the correlation between left atrial parameters and the occurrence of paroxysmal AF in patients with HFpEF.

Results

Compared to the non-AF group, the paroxysmal AF group showed increased LAVmin, LAVImax, and LAVpreA [(64.08±16.44) ml vs (36.67±15.68) ml; (51.68±11.56) ml/m2vs (38.13±10.38) ml/m2; (71.93±16.80) ml vs (50.17±16.99) ml], and the differences were statistically significant (t=-6.610, -6.297, and -5.660, respectively, all P<0.001). The absolute values of LAEV, LAEF, LASr, LASr-c, LAScd, LAScd-c, LASct, and LASct-c were all decreased [(20.93±6.44) ml vs (27.26±9.28) ml; (25.23±7.88)% vs (43.55±9.70)%; (6.78±3.42)% vs (14.41±4.15)%; (7.60±4.25)% vs (21.25±9.59)%; (-4.93±3.08)% vs (-8.65±3.46)%; (-4.93±3.38)% vs (-10.14±5.60)%; (-1.90±3.39) vs (-5.81±3.26); (-2.83±3.24)% vs (-11.72±5.89)%; all P<0.001). LASr demonstrated the highest diagnostic performance for identifying HFpEF with paroxysmal AF (area under the curve [AUC]=0.928, 95% confidence interval [CI]: 0.875-0.980, P<0.001), with an optimal cutoff value of 8.5%, sensitivity of 72.5%, and specificity of 97.1%. Logistic regression analysis demonstrated that LASr was independently associated with paroxysmal AF in HFpEF patients after adjusting for clinical and other echocardiographic parameters (odds ratio=0.340, 95%CI: 0.137-0.847, P=0.011).

Conclusion

The LASr measured by 4D Auto LAQ technology is independently associated with the presence of paroxysmal AF in patients with HFpEF.

Key words: Four-dimensional automatic quantitative technology, Heart failure with preserved ejection fraction, Atrial fibrillation, Left atrial

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