Comparative Study Of Dual-source256-slice Spiral CT And Percutaneous Coronary Angiography In The Diagnosis Of Coronary Heart Disease

Objective:The catheter coronary angiography as a result of the evaluation criteria, to explore256-slice spiral dual-source CT angiography in the evaluation of the accuracy andreliability of the coronary arteries. Assess the advantages and clinical value of256-slicespiral dual-source coronary CTA.Methods:a retrospective analysis of the April2012-2013in October Yan’an UniversityAffiliated Hospital cardiovascular Dong guan Branch Clinically diagnosed or suspectedcoronary artery disease in50cases(including38cases of males and12females), Theaverage age is Statistics obtained two checks the number and extent of coronary arterystenosis. compared the two test results,Data were statistically analyzed to evaluate theadvantage of256-slice dual-source spiral CT diagnosis of coronary artery disease.Results:This study of50patients were successfully obtained diagnosis standard image. Twogroups of similar evaluation on the number of coronary artery stenosis,169and173respectively. DSCT found169coronary lesions,43of coronary artery stenosis＜50%,≥50%stenosis in paragraph126.46segments with mild stenosis, Moderate stenosis61period, severe stenosis with51, totally occluded14segments. CAG found173segments of coronary lesions. Diagnosis of coronary stenosis≥50%142segment,Coronary stenosis＜50%with31segments, Including31segments with mild stenosis,moderate stenosis of64segments,69segments with severe stenosis, occlusion ofparagraph9.Use χ2test, Calculating P＞0.05the final result of DSCTand CAG haveno statistical difference. Assessed50cases of patients with coronary artery diameter stenosis≥1.5mm sensitivity, accuracy, specificity, positive and negative predictivevalues were91.11%,97.09%,98.46%,97.97%,93.18%. Also DSCT can be a gooddiagnosis of myocardial bridge and coronary artery abnormalities,and has great clinicalsignificance to follow-up restenosis after stent implantation. And can take into account toassess the surrounding lung tissue, valvular, aortic, pulmonary, cardiac size and shape,myocardial density, cardiac function evaluation, provide more valuable diagnosticinformation for clinical reference.Conclusion:1. Compared with CAG,there was no statistically significant difference on thenarrow section number and the degree of stenosis which256-DSCT assessed.2.256-DSCT as a non-invasive imaging methods, and its low cost, simple operation,small radiation, better compliance, fewer complications, etc., have high diagnostic valuein the diagnosis of coronary artery diseases, can be used as a routine examination toscreening, diagnosis of coronary artery stenosis and follow-up after stent implantation.3.256-DSCT can be a good diagnosis of myocardial bridge, coronary arteryanomalies, etc., can provide more convenient and accurate information for clinicaldiagnosis and treatment.4256-DSCTAcan be found both inside and outside the lumen of the coronary softplaque,DSA is more sensitive than256-DSCT to suggest early atherosclerotic changes incoronary.5. For complex coronary artery disease,should select the appropriate check under thespecific circumstances of patients, when necessary, can cooperate to use both of them.