Research Of The Relationship Between ECG And Coronary Artery Disease In Non-ST-segment Elevation Myocardial Infarction

Objective: Non-ST-segment elevation myocardial infarction(NSTEMI) for acute coronary syndrome(ACS) in a subgroup, and the pathogenesis of acute ST segment elevation myocardial infarction are similar, the acute thrombus in the foundation of unstable plaque induced, causes of acute ST segment infarction mostly because of the formation of occlusive thrombosis, and acute non-ST-segment elevation myocardial infarction causes is the formation of non occlusive thrombus, or although the occlusion of distal, but the formation of collateral circulation.As medical technology continues to improve,NSTEMI in patients with acute coronary syndrome in proportion is also gradually increased, and its high incidence rate, but lower survival rate, poor prognosis and ECG changes not typical,NSTEMI has become a hot and difficult research of cardiovascular disease,which is Serious threat to people’s health and quality of life, Therefore, this study combined with comparative analysis of electrocardiogram and coronary angiography results, through the ECG findings reflecting coronary vascular diseases, to provide some reference value for clinicians,Thus physician in clinical work can faster, more accurate diagnosis of disease, timely, standardized clinical therapeutic measures taken.Methods: A retrospective analysis of patients with acute non ST segment in January 1 2014 December to 31st-2014 was diagnosed in Liaoning province people’s Hospital elevation myocardial infarction patients,All the selected patients underwent coronary artery angiography examination, There are 71 cases, including male patients with a total of 38 cases(54%) and 33 cases female patients(46% in total).Age 40~86years old, the average age of(64.62 ± 10.31). Of which 55 cases complicated by hypertension(77%),diabetes mellitus 22 cases(31%).All selected patients from the onset of symptoms for the standard 12 lead electrocardiogram, and underwent an emergency or elective coronary artery angiography. Analysis of electrocardiogram in all patients were retrospectively.Record the general condition of the patient, including gender, age,history of diabetes, hypertension, smoking, high cholesterol in history. Patients with single, double or three branch + vascular lesions, infarction related artery were recorded according to the number of left main coronary artery angiographyThe results.In this study, the measurement data are expressed as mean ± standard deviation( Xˉ±s)said that the measurement data between the two groups were compared using independent sample test.count data using 100 percent(%) said,The count data were compared using chi-square test,P<0.05 was considered statistically significant. All data were processed using SPSS17.0 software.Results:(1)Infarction related artery is seen most frequently in the LCX;(2)AVR lead in non-ST-segment elevation group(group I) and AVR lead ST-segment elevation group and high group(group II) of the basic clinical characteristics have no statistical significance. The number of AVR elevation group and coronary angiography of three vessel and left main lesion is significantly higher than that in non ST segment elevation in lead AVR group(group I)(P < 0.05), and the elevation group left main lesions in 8 cases, accounting for 67% of the total. AVR elevation coronary angiography of single branch lesion group was significantly lower than that of AVR without elevation group. Double branch lesions there was no statistical significance between the two groups;(3)V2-V6 lead ST segment depression group and the 2-V6 lead ST segment without basic clinical features of diabetes history and smoking history of depression group have statistical significance, other clinical characteristics of no statistical significance. Two groups of involved vessels in patients with table 4. Three branch lesion of V2-V6 ST segment depression in lead group has significantly higher proportion than lower group;(4)V2-V6 lead ST segment of ECG is not depressed group of three vessel lesions mainly down to V4-V6 lead ST segment, the second is associated with I, AVL lead ST segment depression;(5)AVL lead ST segment depression culprit vessels is possibility of greater in LAD thI,e than LCX and RCA;(6) II, III, AVF lead ST segment depression during LCX and RCA like culprit vessel;(7)Involving the precordial leads the most vulnerable to the pure T wave change,and have a certain degree of anterior descending branch and three branch lesion occurrence probability;(8)Normal ECG can not be ignored;(9)Acute non ST segment elevation myocardial infarction three vessel disease or chronic total occlusion has abundant collateral circulation;Conclusion: Infarction related artery is seen most frequently in the LCX;In patients with acute non ST segment elevation myocardial infarction, aVR ECG ST segment elevation V2-V6, ST segment depression in lead V4-V6, lead ST segment depression with or without I, AVL lead ST segment depression has prompted three branch lesions of the important role of I, AVL; ST segment depression in lead criminals may of vascular LAD more than LCX and RCA; II, III, AVF lead ST segment depression during LCX and RCA likely culprit vessel.