Clinical application of 64-slice spiral CT for apical hypertrophic cardiomyopathy / 中华放射学杂志

ABSTRACT

Objective To evaluate the clinical application values of 64-row MSCT for apical hypertrophic cardiomyopathy(AHCM).Methods Twenty-one patients with AHCM were included in this study,14 patients were diagnosed by echocardiography(UCG),and 7 patients were diagnosed by MRL AU patients underwent MSCT exam,and 5 patients also had ventriculography and coronary angiography.The left ventricular wall thickness in end-systole and end-diastole phases were measured at MSCT workstation,the left ventricular apex thickening rate(LVAT)and the ratio of maximum wall thickness of the left ventrieular apex(LVA)to the left ventricular posterior wall thickness(LVA/LVPW)in end-diastole phase were calcdated.The left ventricular end-diastolie volume(LVEDV)and left venueular ejection fraction (LVEF)were quantitively evaluated with cardiac functional analysis software.The results were compared with the measurement results from the normal control group(30 volunteers).The independent-samples t test was used for the statistics.At the same time.the coronary stenosis was measured.Results Diffuse or partial thickening of the LV apical myocardium were found in the four-chamber view and two-chamber view of MSCT images.which leaded to the deformation of the left ventricle chamber.The LVEDV were(82.6±11.4)and(108.5±10.6)ml in the AHCM group and the control group,respectively;the LVA were (20.6±3.4)and(9.9±1.5)mm;LVA/LVPW were 2.1±0.5 and 1.1±0.2;the LVAT were(25.6±4.7)%and(81.5±8.5)%.There were significant differences in LVEDV,LVA,LVA/LVPW and LVAT between the two groups(t=8.32 and 15.29,P＜0.05;t=9.91 and 27.30,P＜0.05;respectively),but there were no statistical differences in LVPW and LVEF between the two groups(t=0.26 and 1.13.P＞0.05).Five patients had myocardium bridging and 4 patients had coronary stenosis.Conclusion AHCM can be diagnosed accurately with MSCT,and the cardiac anatomy.function and coronary artery are also assessed simultaneously.