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Clinical Article
Preliminary study on the assessment of left atrial myocardial deformation in patients with hypertrophic cardiomyopathy using CMR technology
ZENG Fengxian  CHEN Huayan  LIN Wenjun  JIANG Jianrong  CHEN Qiqiang 

Cite this article as: ZENG F X, CHEN H Y, LIN W J, et al. Preliminary study on the assessment of left atrial myocardial deformation in patients with hypertrophic cardiomyopathy using CMR technology[J]. Chin J Magn Reson Imaging, 2024, 15(9): 74-79. DOI:10.12015/issn.1674-8034.2024.09.013.


[Abstract] Objective To explore the application value of cardiac magnetic resonance (CMR) technology in the assessment of left atrium (LA) myocardial deformation in patients with hypertrophic cardiomyopathy (HCM).Materials and Methods The clinical data of 45 HCM patients who were treated in our hospital from January 2020 to October 2023 were retrospectively analyzed. The patients underwent echocardiography and were divided into categories according to left ventricular ejection fraction (LVEF). There were 31 cases in the normal group (55%≤LVEF<70%) and 14 cases in the abnormal group (LVEF<55%). A total of 45 healthy subjects who underwent cardiac examinations in our hospital were selected as the control group. Three groups of general information and the imaging data of the CMR examination were compared between the three groups of cardiac function indicators and LA myocardial deformation indicators. Pearson correlation was used to analyze the correlation between cardiac function indicators and LA myocardial deformation indicators, and the receiver operating characteristic (ROC) curve was used. Curve analysis of the diagnostic value of myocardial deformation indicators for HCM.Results There was no statistically significant difference in gender, age, body mass index (BMI), and cardiac index among the three groups (P>0.05). The LA maximum volume (LA maximum volume, LAVmax) and LA were the smallest in the normal group and the abnormal group. The volume (LA minimum volume, LAVmin) was higher than that of the control group, the left atrial total ejection fraction (LATEF), cardiac output and LVEF were lower than those of the control group, and the LAVmax and LAVmin of the abnormal group were higher than those of the normal group. The stroke volume was lower than that in the normal group and control group (P<0.05). The storage strain and pump strain in the normal group and the abnormal group were lower than those in the control group (P<0.05). The storage strain and pump strain of the myocardial deformation indexes were negatively correlated with LAVmax and LAVmin (r=-0.605–-0.573, P<0.05). There was a positive correlation with LATEF, cardiac output, stroke volume, cardiac index and LVEF (r=0.521–0.669, P<0.05). ROC curve analysis found that the AUC of storage strain and pump strain in diagnosing HCM were 0.714 and 0.699 respectively, and the AUC of their combined diagnosis was 0.820. The sensitivity and specificity were 74.2% and 78.6% respectively (P<0.05).Conclusions CMR technology has high evaluation value in LA myocardial deformation in HCM patients. By evaluating LA myocardial deformation, it can assist in the diagnosis of HCM and also evaluate their cardiac function.
[Keywords] cardiac magnetic resonance;hypertrophic cardiomyopathy;myocardial deformation;ejection function;cardiac function;magnetic resonance imaging

ZENG Fengxian   CHEN Huayan   LIN Wenjun   JIANG Jianrong*   CHEN Qiqiang  

Department of Radiology, Mindong Hospital Affiliated to Fujian Medical University, Fu'an 355000, China

Corresponding author: JIANG J R, E-mail: zy1103290@126.com

Conflicts of interest   None.

Received  2024-02-20
Accepted  2024-08-12
DOI: 10.12015/issn.1674-8034.2024.09.013
Cite this article as: ZENG F X, CHEN H Y, LIN W J, et al. Preliminary study on the assessment of left atrial myocardial deformation in patients with hypertrophic cardiomyopathy using CMR technology[J]. Chin J Magn Reson Imaging, 2024, 15(9): 74-79. DOI:10.12015/issn.1674-8034.2024.09.013.

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