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Comparing the guidelines: anticoagulation therapy to optimize stroke prevention in patients with atrial fibrillation

^* Stanford University, Stanford, California, USA

View larger version (19K): [in a new window]   Figure 1 Warfarin use reduces the annual stroke rate compared with controls in patients with a variety of risk factors. CAD = coronary artery disease; CHF = congestive heart failure; HTN = hypertension; MI = myocardial infarction; PVD = pulmonary vascular disease; TIA = transient ischemic attack (3). Solid bars = control; open bars = warfarin.

View larger version (12K): [in a new window]   Figure 2 Relationship between the CHADS2 score and the risk of stroke (14).