Correlation Between Left Anterior Descending Coronary Artery Myocardial Bridge And Coronary Atherosclerosis By Intravascular Ultrasound

Objective This study examined the correlation between left anterior descending coronary artery myocardial bridge and coronary atherosclerosis using intravascular ultrasound.Methods A total of 102 patients with intravascular ultrasound were enrolled in the Department of Cardiology of General Hospital of Ningxia Medical University and Cardiovascular Hospitalfrom June 2013 to december 2016.50 cases of patients with coronary artery anterior descending myocardial bridge and coronary atherosclerosis were group A,and52 patients without myocardial bridge were group B.Group A was divided into A1?A2 and A3 group according to the degree of disease.All data collected were processed using the SPSS17.0 statistical software package.The count data was expressed as a percentage,the measurement data were expressed as mean ± standard deviation,and the test standard for the P <0.05 was statistically significant.Results 1.Group A and Group B were compared: The incidence of hyperlipidemia in group A(48.00%)was significantly lower than that in group B(67.31%).The difference between the two groups was statistically significant(P <0.05);The levels of total cholesterol,triglyceride and low density lipoprotein in group A were lower than those in group B(A VS B,3.78±1.17 mmol / L vs 4.30±1.44 mmol / L;1.88±1.17 mmol / L vs 2.51±1.62 mmol / L,2.31±1.02 mmol / L vs 2.93±1.36mmol/L,P<0.05),the difference between the two groups wasstatistically significant.Sex,smoking,history of hypertension,history of diabetes,family history of coronary heart disease,plaque nature and other count data,through the four tables?2test analysis;age,high density lipoprotein,plaque area,plaque eccentric index,vascular remodeling index,maximum plaque load and other measurement data,using two independent samples t test statistical analysis.The difference of A group and B group was not statistically significant(P> 0.05).There was significant positive correlation between Max PB and myocardial bridge thickness and AC correlation analysis,P <0.05.Ethnicity,sex,smoking,hypertension,hyperlipidemia,diabetes,family history of coronary heart disease count data,through ?2test or Fisher exact test;Age,total cholesterol,triglyceride,high density lipoprotein,low density lipoprotein,left ventricular ejection fraction,plaque eccentric index,vascular remodeling index and other measurement data,the statistical analysis,the difference was not statistically significant(P> 0.05).And from 50 cases of anterior descending myocardial bridge,the statistics was found that atherosclerotic plaque at a total of 77,myocardial bridge proximal blood vessels 50(64.94%),muscle bridge 14(18.18),myocardial bridge distal blood vessels13(16.88%),and the difference was statistically significant(P <0.05)by nonparametric test.Conclusions 1.Myocardial bridge patients compared with patients without myocardial bridge in the formation of a considerable amount of plaque,myocardial bridge patients may require lower concentrations of lipid,that is more sensitive.2.Patients with left anterior descending branch of the myocardium bridge are prone to form coronary atherosclerotic plaques near the proximal myocardial bridge.3.The thickness of the myocardial bridge and the degree of compression of myocardial bridge-coronary artery were positively correlated with the degree of coronary artery stenosis,suggesting that the myocardial bridge may play an important role in the process of coronary atherosclerosis.