Acta Academiae Medicinae Sinica

Abstract: ABSTRACT:Objective To evaluate the role of cardiac magnetic resonance (CMR) sequence in assessing the cardiac structure and function. Methods A total of 36 healthy volunteers were examined with fast imaging employing steady-state acquisition cine MR sequence. All the MR images were processed on Report Card software to test the cardiac dimensions and function. The relationships between the CMR Results and the ultrasonic cardiography (UCG) Results were analyzed. Results CMR analysis showed that interventricular septum thickness, left ventricle posterior wall thickness, end diastolic dimension of left ventricle, and end systolic dimension of left ventricle were (9.2±2.1), (8.0±2.1), (48.6±5.5), and (30.3±5.3) mm, respectively. Major dimension of right ventricle, minor dimension of right ventricle, index of major, dimension of right ventricle and index of minor dimension of right ventricle were (69.2±9.7), (30.6±6.6) mm, and (39.4±5.5), (18.1±3.4)mm/m2, respectively. The left ventricle indicators above measured by CMR correlated with those by UCG (r=0.843, 0.784, 0.686, 0.730, all P<0.01). CMR analysis showed that left ventricular end diastolic volume, right ventricular end diastolic volume, left ventricular end systolic volume, and right ventricular end systolic volume were (93.6±17.2), (108.6±28.2),(39.5±13.0), and (45.6±15.1)ml, respectively. The left ventricular ejection fraction and right ventricular ejection fraction were (58.5±8.19)％ and (58.2±7.4)％, respectively. Left ventricular ejection fraction measured by CMR was correlated with that (64.1±6.8) ％ by UCG (r=0.75, P<0.01). Conclusions CMR sequence with standard location is well applicable for accurate measurement of left and right ventricle dimensions and function, especially for right ventricle. CMR can be used to diagnose the heart disease and monitor the efficacy.

Key words: cardiac macnetic resonance, cine sequence, ventricular structure and function, ultrasonic cardiocrapdy