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Objectives The objective of this study is to develop a simple risk score to predict 30-day mortality of aortic valve replacement (AVR). Methods In a development set of 673 consecutive patients who underwent AVR between 1990 and 1993, four independent predictors for 30-day mortality were identified: body mass index (BMI) ≥30, BMI <20, previous coronary artery bypass grafting (CABG) and recent...