Evaluation of left ventricular diastolic function by fractional area change using cine cardiovascular magnetic...

Area of Science:

• Cardiology
• Medical Imaging
• Cardiovascular Physiology

Background:

• Left ventricular (LV) diastolic dysfunction is critical in heart failure management.
• Accurate assessment of LV diastolic function is essential for patient care.
• Current methods may have limitations, necessitating alternative evaluation techniques.

Purpose of the Study:

• To determine if fractional area change (FAC) measured by cine cardiovascular magnetic resonance (CMR) can effectively evaluate LV diastolic function.
• To compare FAC measurements with established echocardiographic parameters.
• To assess the correlation between FAC and the severity of diastolic dysfunction.

Main Methods:

• Retrospective analysis of clinical data from 59 patients undergoing echocardiography and cine CMR.
• Calculation of FAC during early diastole (diastolic-index%) from short-axis cine CMR images.
• Categorization of patients based on LV filling patterns: normal, impaired relaxation, pseudonormal, and restrictive.

Main Results:

• The diastolic index derived from FAC was significantly lower in patients with impaired relaxation, pseudonormal, and restrictive filling compared to normal diastolic function (p < 0.0001).
• A significant decrease in the diastolic index was observed with increasing severity of diastolic dysfunction.
• The diastolic index showed a strong positive correlation with early diastolic mitral annular velocity from tissue Doppler imaging (r = 0.75, p < 0.0001).

Conclusions:

• Measurement of fractional area change (FAC) using cine CMR is a valuable tool for assessing LV diastolic function.
• This non-invasive CMR-derived FAC provides a reliable method for evaluating diastolic dysfunction.
• FAC measurement offers a promising approach for routine clinical assessment of diastolic function.