Imaging Anatomy Study Of Variation Form Of Left Coronary Artery

Objective:Using CT to study the structure of the left coronary artery, includingstarting, finishing lines and walking variation for the study of the leftcoronary artery to provide image data.(in order to provide image data forthe study of the study of the left coronary)Materials and methods:Select July2009-October2009during the visit at the First Hospitalof Jilin University, Bethune Medical College,60patients including40males and20females, aged26to87years, mean age56.2years old.Heart rate of50to150beats/min, cardiac examination no abnormalchanges.(Select60patients admitted in the First Hospital of JilinUniversity, Bethune Medical College during July2009-October2009,aged from34to67,52.2in average,with the heart rate of55to130beats/min,and the cardiac examination show no abnormal changes.)Using the German company SIEMENS dual-source CT (SOMATOMDefination) scanner, the reconstructed image will be transferred to thepost-processing workstation Syngo match, the results were observed, andin the three-dimensional reconstruction of the relevant parameters weremeasured, and the use of statistical software for data for processing.Results:1From the left coronary artery from the aortic root, the opening inthe left aortic sinus, but there are variations, in the present set of results,95%of the left coronary artery in the left coronary sinus openings, or1.3%, starting from the right coronary sinus,1.3%high opening,2.5%opening in the pulmonary artery.2The length of the left main coronary artery; their average length of 8.6±1.3mm, max13.1mm, minimum3.7mm. Were measured at thebeginning of the left coronary artery and a distal end diameter, theaverage outer diameter of4.4±1.2mm and4.8±1.5mm.3.Diagonal branch has a branch in11cases, accounting for13.8%of the branch has two7cases (8.8%), there are three branches of the ninecases, accounting for11.3%; unbranched53cases, accounting for66.2%.4From the bottom of the diagonal branch of the left coronary arterybifurcation in19cases, accounting for70.3%; from the bottom of theanterior interventricular branch has five cases, accounting for19.5%,from the bottom of left circumflex artery in3cases, accounting for11.1%.5.Diagonal branch average length25.9±8.3mm, max30.4, min10.8, mean diameter2.1±0.4mm, max2.8mm, minimum2.1±0.4.Anterior interventricular branch of left coronary artery and circumflexartery between the angle of40～59°are four cases, accounting for5.0%, the angle is60～79°for18cases, accounting for22.5%,80～99°angle there38cases, accounting for47.5%, the angle is100～119°,9patients (11.3%) at an angle of120～139°with onecase, accounting for1.25percent. Anterior interventricular branch of leftcoronary artery and circumflex artery diameter at the start of the averagewere2.9±0.8mm and3.2±1.0mm.Conclusion:1.Dual-source CT coronary angiography has no clinical symptoms inpatients with coronary artery variation detection. Not only non-invasiveand easy to check, high accuracy.2.Dual-source CT coronary imaging no longer subject to theinfluence of the heart rate. 3.The emergence of the left coronary artery from the diagonalbranch rate is higher, when who suffer coronary angiography should bepay attention to its existence, to avoid the deficiency such as infarctionfor diagonal one.