INTROUDACTION : Arterial chronic hypertension (HTN) is a well-known associated with myocardial infarction because it is un cardiovascular risk factor for development of atherosclerosis, And there are risk factors shared by the two diseases, such as genetic risk, insulin resistance, sympathetic hyperactivity, and vasoactive substances (i.e., angiotensin II); In patients with acute myocardial infarction (AMI) with ST elevation , the prevalence of antecedent hypertension is 32% and these percentage increases with age and in women METHODES:Our study is formed in service of soine intensive in al Assad hospital in Lattaquia ,it includes every patient was admitted in our service for myocardial infarction with ST elevation within period from January 2014 to juin 2015 At admission we took the following information: age .sex, history of hypertension . therapy And the cardiovascular risk factures as diabetes , hyperlipidemia, smoking, familial history, obesity RESULTS: in our study,in patients with acute myocardial infarction (AMI)withST elevation , the prevalence of antecedent hypertension is 43%(39\90) women48.5(17\35) men 40%(22\55) and this percentage increase with age and more in women , reaching 100% in patients over the age of 80 year ,in our study 48%of patients with hypertension don’t take their treatment And 90%have more than one risk factor CONCLUSION :The proportion of hypertension in patients with myocardial infarction with ST elevation in our study was 43%.