Research Brief: BP fall during surgery may affect mental state

Patients whose mean arterial BP drops during coronary artery bypass surgery may be at an increased risk of cognitive decline, US research has suggested. The researchers assessed 15 patients, aged 57 to 81, undergoing bypass surgery. Those whose mean arterial BP decreased by 27mmHg or more had an average decrease in score on the mini-mental state examination of 1.4 points (Arch Neurol Online 2007).

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