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Association of age and cardiometabolic risk factors with cardiac diastolic function change in patients with bipolar
Cheng-Yi Hsiao1, Yen-Kuang Lin2, Hsin-Yi Lai3
1Division of Cardiology, Department of Internal Medicine, Taipei Medical University Hospital, Taipei, Taiwan; Cardiovascular Research Center, Taipei Medical University Hospital, Taipei, Taiwan; Taipei Heart Institute, Taipei Medical University, Taipei, Taiwan; School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan.
Insights
Patients with bipolar disorder (BD) show poorer cardiac diastolic function. Cardiometabolic risk factors like age and insulin resistance worsen this, while lithium may improve it.
Area of Science:
- Cardiology
- Psychiatry
- Echocardiography
Background:
- Asymptomatic diastolic dysfunction is linked to heart failure and reduced survival.
- Limited research exists on cardiac diastolic function in bipolar disorder (BD) patients.
- Risk factors for diastolic dysfunction in BD remain under-investigated.
Purpose of the Study:
- To evaluate cardiac diastolic function in patients with bipolar disorder (BD).
- To identify risk factors associated with asymptomatic diastolic dysfunction in BD.
- To compare diastolic function between BD patients and healthy controls.
Main Methods:
- 127 individuals (65 BD, 62 controls) under 45 without heart failure diagnosis were recruited.
- Conventional and speckle-tracking echocardiography were performed.
- Cardiometabolic risk factors were assessed via standard in-hospital examinations.
Main Results:
- BD patients exhibited significantly lower E velocity, septal e' velocity, average e' velocity, and E/A ratio compared to controls.
- Left atrial conduit strain was significantly higher (indicating greater impairment) in the BD group.
- Age, diastolic blood pressure, insulin resistance, and BMI were associated with poorer diastolic function in BD; lithium use was linked to better diastolic function and lower left ventricular mass index.
Conclusions:
- Poorer diastolic function in BD is associated with increased age and cardiometabolic risk factors.
- Proactive cardiometabolic interventions should be integrated into mental health care for BD patients.
- Findings highlight the cardiac implications of BD and the need for comprehensive management.
Background:
Asymptomatic diastolic dysfunction is associated with heart failure and reduced survival. Few studies have evaluated the cardiac diastolic function of patients with bipolar disorder (BD) or examined the risk factors associated with asymptomatic diastolic dysfunction.
Methods:
A total of 127 individuals (65 BD and 62 mentally healthy controls) under age 45 without a clinical diagnosis of heart failure were recruited to undergo conventional and speckle-tracking echocardiography. Echocardiographic procedures were performed in accordance with the recommendations of the American Society of Echocardiography. Cardiometabolic risk factors were obtained using standard in-hospital examinations.
Results:
Compared with the mentally healthy group, the BD group had significantly lower values of E velocity (Cohen d = 0.40), septal e' velocity (Cohen d = 0.65), average e' velocity (Cohen d = 0.41), and E/A ratio (Cohen d = 0.42) and a higher value (i.e., greater impairment) of left atrial conduit strain (Cohen d = 0.38). Multiple linear regression analysis revealed that age, diastolic blood pressure, serum fasting insulin, homeostasis model assessment of insulin resistance, and body mass index were significantly associated with poorer diastolic function in the BD group, whereas lithium use was associated with better diastolic function and a lower left ventricular mass index.
Conclusion:
Increased age and cardiometabolic risk factors are associated with poorer diastolic function in individuals with BD. The findings underscore the importance of integrating proactive cardiometabolic interventions into mental health-care programs designed for this at-risk group.
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