Dual-source computed tomography for evaluating coronary stenosis and left ventricular function

Area of Science:

• Cardiology
• Radiology
• Medical Imaging

Background:

• Coronary artery disease (CAD) affects cardiac function.
• Accurate assessment of coronary stenosis and its functional impact is crucial for patient management.

Purpose of the Study:

• To evaluate the correlation between coronary stenosis severity and left ventricular function using dual-source computed tomography coronary angiography (DSCT CAG).
• To compare the diagnostic accuracy of DSCT CAG with conventional methods like selective CAG and echocardiography (ECHO).

Main Methods:

• DSCT CAG was performed on 66 patients with coronary disease and 36 healthy volunteers.
• Left ventricular parameters including end-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV), ejection fraction (EF), and myocardial mass (MM) were measured.
• Results were compared against selective CAG and ECHO as control methods.

Main Results:

• DSCT CAG showed no significant difference in diagnosing coronary stenosis compared to selective CAG (P>0.05).
• DSCT CAG measurements of EDV, ESV, and SV were comparable to ECHO findings (P>0.05).
• Significant differences in ESV, EF, and SV were observed in the severe stenosis group compared to mild and moderate groups (P<0.05). EDV and MM varied significantly across stenosis severity groups (P<0.05).

Conclusions:

• DSCT CAG is a highly accurate and reproducible method for assessing preliminary cardiac function changes related to coronary stenosis.
• Significant alterations in left ventricular EDV and MM were detected in moderate stenosis, with comprehensive changes in all parameters observed in severe stenosis.