Using the CHADS-VASc system, each patient in thepresent study was assigned 1 point for each of the following
factors:thepresence of CHF/left ventricular dysfunction;age 65 to 74 years;presence ofhypertension
(systolic BP >160 mmHg),diabetes,orvascular disease(coronaryarterydisease, acute myocardial infarction, peripheral
artery disease, aortic plaque); and female sex. Two pointswere assigned for each of the following factors: age ≥75
years and history of stroke, TIA, and thromboembolism.