Right ventricular involvement in diabetic cardiomyopathy

Area of Science:

• Cardiology
• Diabetology
• Medical Imaging

Background:

• Type 2 diabetes is associated with cardiovascular complications.
• Diabetic cardiomyopathy is increasingly recognized, but right ventricular involvement is less understood.

Purpose of the Study:

• To compare right ventricular (RV) dimensions and function using magnetic resonance imaging (MRI) in men with type 2 diabetes versus healthy controls.
• To investigate the relationship between RV parameters and left ventricular (LV) dimensions and function in these groups.

Main Methods:

• MRI was used to assess RV and LV volumes and functions in 78 men with type 2 diabetes and 28 healthy men.
• Steady-state free precession sequences and flow velocity mapping were employed for ventricular and valvular assessments.
• Univariate general linear models analyzed the data.

Main Results:

• Men with type 2 diabetes showed significantly decreased RV end-diastolic volume compared to controls.
• Impaired RV systolic function was evidenced by reduced peak ejection rate and prolonged acceleration time.
• RV diastolic function was also impaired, with reduced peak filling rate and deceleration gradient.

Conclusions:

• Diabetic cardiomyopathy affects the right ventricle, manifesting as remodeling and impaired systolic and diastolic functions in men with type 2 diabetes.
• These RV changes are similar to those observed in the left ventricle.
• Right ventricular impairment is likely a key component of the diabetic cardiomyopathy phenotype.