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Probability of postoperative stroke. To determine a patient’s risk of developing a stroke, ask the following questions and then proceed to the correct part of the flowchart: Has the patient had a previous stroke, yes or no; does the patient have a diagnosis of hypertension (HTN), yes or no. Next, determine the patient’s age and proceed to the correct row of age groupings to see the probability for that patient. (Adapted from McKhann et al.34)
