الفهرس 
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Abstract
Postoperative atrial fibrillation (POAF) is still the most common complication following cardiac surgery; therefore, it remains challenging to treat, prevent or cure (Zhi et al.,2019;Van Wagoner .,2007). Postoperative atrial fibrillation after CABG within the first 2 to 3 days is relatively common with recorded incidence of 20 to 40% , POAF is associated with increased morbidity, higher risk of embolic stroke postoperatively and increased mortality (Benedetto et al., 2020). Many of the medications have been used to prevent postoperative AF. Since sympathetic activation is essential in the pathogenesis of AF after surgery, using beta-blockers such as propranolol, metoprolol, and atenolol is a good option for prophylaxis. The use of intravenous magnesium sulfate before surgery also reduces the incidence of AF after cardiac surgery. Patients who are digitalized in before the surgery are less likely to have postoperative AF (Naqvi and Hussain ,2008).