IRCT2013100514862N1 IRCT 2013-11-23 Vice Deputy Ahvaz Jundishapur University of Medical Sciences The effect of blood pressure medicines in Coronary Artery operation Evaluation of the efficacy of angiotensin inhibitor before coronary bypass on hemodynamic changes and need to vasoactive medicines 2013-01-15 anticipated 54 Complete https://irct.ir/trial/14336 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment. N/A Cardiovascular disease. Intervention 1: This study included 27 persons (control group) who did not use angiotensin inhibitors to control blood pressure. They used drugs such as 20 mg Metoral four times a day and 50 mg Atenolol twice a day in order to control blood pressure. In this group, their hemodynamic changes were evaluated before, during, and after the CABG surgery. Intervention 2: The other group included 27 persons (experimental group) who received the angiotensin inhibitor with the dosage of 25 mg twice a day and underwent surgery by general anesthesia. The experiment group patients, who are explained above, used only blood pressure medication or if they received a second drug like β-blocker, the dosage forms would be the same. In this group of patients, the needed amount of vasoactive drugs, the efficacy of angiotensin inhibitor on the hypotension rate during surgery, and induction, and the needed amount of vasopressor drugs were surveyed.