Assessment of regional myocardial function in patients with dilated cardiomyopathy by velocity vector imaging

Area of Science:

• Cardiology
• Medical Imaging
• Biomedical Engineering

Background:

• Dilated cardiomyopathy (DCM) is a significant cause of heart failure.
• Accurate assessment of left ventricular (LV) function is crucial for DCM management.
• Traditional methods may have limitations in quantifying regional systolic and diastolic function.

Purpose of the Study:

• To evaluate the efficacy of syngo Velocity Vector Imaging (VVI) in assessing LV longitudinal systolic and diastolic function in DCM patients.
• To compare VVI-derived parameters between DCM patients and healthy controls.
• To establish VVI as a quantitative tool for DCM evaluation.

Main Methods:

• Digital dynamic cardiac images were acquired from 30 DCM patients and 30 healthy controls.
• Longitudinal velocity, strain, and strain rate were measured during systolic and diastolic phases using VVI.
• Time to peak systolic velocity, strain, and strain rate were recorded and analyzed.

Main Results:

• DCM patients exhibited significantly reduced longitudinal systolic and early diastolic function parameters compared to controls (P < 0.05-0.01).
• Late diastolic strain did not show a significant difference between DCM patients and healthy subjects (P > 0.05).
• VVI demonstrated objective and quantitative differences in LV function between the groups.

Conclusions:

• syngo Velocity Vector Imaging (VVI) is a novel, noninvasive tool for objective assessment of LV regional systolic and diastolic function in DCM.
• VVI provides a valuable additional modality for comprehensive cardiac function evaluation in patients with dilated cardiomyopathy.
• This technique enhances the quantitative understanding of myocardial mechanics in DCM.