Abstract: The clinical value of computed tomography, magnetic resonance imaging and the combined testing in assessment of left ventricular function in patients with coronary artery disease (CAD) is discussed in this article. 93 patients with known CAD were enrolled, all these patients had been scanned with cardiac MDCT and MRI. End-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV) and ejection fraction (EF) were calculated. Among these patients,21 had angina and 72 had myocardial infarction. Patients with myocardial infarction were graded using Killip classification according to clinical symptoms and physical examination, and the differences in CT and MRI assessment of cardiac function between different levels were analyzed. The results showed that there were strong correlations between MDCT and CMR results,and there was a high consistency in the assessment of left ventricular function. MDCT and CMRI have a high value of diagnostic in CAD patients with left heart impaired (AUC>0.79), and the diagnostic accuracy of the parallel test for CAD patients with impaired cardiac function was nearly 80%. MDCT and CMRI have a high sensitivity, specificity and accuracy in diagnosing patients with left heart impaired.

Key words: computed tomography, magnetic resonance imaging, left ventricular function, coronary artery disease