H. Daily follow up of serum creatinine at 24, 48 hours. I. CHA2DS2-VASC score will be calculated for each patient. Based on the CHA2DS2-VASC score, patients are given 1 point for CHF, hypertension, age 65 to 74 years, diabetes mellitus, vascular disease and female gender and 2 points for age 75 years or older and previous stroke or transient ischemic attack.