Clinical Analysis Of Non-ST-segment Elevation Acute Myocardial Infarction

Objective To investigate the clinical characteristics of non-ST-segment elevationacute myocardial infarction.Methods The author chooses138patients in line with the diagnostic criteria ofacute myocardial infarction from December2011to June2013in Shanxi Dayihospital as the research object and divides them into two groups; one is thenon-ST-segment elevation acute myocardial infarction (NSTEMI), the other is theST-segment elevation acute myocardial infarction (STEMI). The NSTEMI groupcontains52cases,30cases of male, female22cases, with an average age of66.57±9.03(50~82). The STEMI group contains86cases,66cases of male, female20cases,with an average age of57.86±11.45(45~76). By reviewing the medical record ofthose selected patients for its clinical information (such as age, gender, bloodpressure, blood lipid, blood glucose, Past Medical History), coronary angiographyand Coronary Revascularization data etc., the author keeps a record of the occurrenceof the patients’ adverse event during hospitalization (the adverse event includingrecurrence of angina, Heart failure, arrhythmia and death). After discharging, theauthor specifies the occurrence of adverse event (including recurrence of angina,repeated infarction，target lesion revascularization and death) through returning visitof the outpatient or telephone follow-up for6months. By comparing the hazardsfactors, coronary angiography results and the occurrence rate of adverse event duringhospitalization and follow-up period of the two groups, the author sums up theclinical characteristics of NSTEMI.Results1.There were more females and old people in NSTEMI group, and thenumber of patient with diabetes and history of old myocardial infarction was more that that of STEMI group (P<0.05).2.Coronary angiography showed that multivessel desease rate, height stenosisrate and collateral circulation rate of NSTEMI group were higher than that of STEMIgroup (P<0.05), on the contrary, single lesion rate is lower than STEMI group.3.The NSTEMI group had more possibility of Recurrence of angina pectoris(P<0.05). Heart failure, arrhythmia and death do not have statistical differencebetween the NSTEMI and STEMI group.4.All adverse events (including recurrence of angina pectoris, repeatedinfarction，target lesion revascularization and death) of NSTEMI group occurredwithin six months of follow-up were higher than STEMI group (P<0.05).Conclusion There were more females and old people in NSTEMI group, oftenmerges with diabetes history of old myocardial infarction and three vessel coronaryartery lesions， collateral circulation frequently occurs. While in hospital theNSTEMI group had more possibility of Recurrence of angina pectoris, heart failure,arrhythmia and death do not have statistical difference between the NSTEMI andSTEMI group. All adverse events of NSTEMI group occurred within six months offollow-up were higher than STEMI group and with poor prognosis.