Impairment of left ventricular diastolic function during coronary artery bypass grafting

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Abstract
Twelve patients were studied by transoesophageal Doppler echocardiography to determine diastolic function during coronary artery bypass grafting. Haemodynamic and Doppler-derived variables were measured after induction of anaesthesia and after closure of the sternum. Early diastolic filling of the left ventricle decreased from 55% to 35% during surgery. The contribution of atrial contraction to left ventricular filling increased from 41% to 62% (p < 0.001). We conclude that coronary artery bypass grafting results in impairment of diastolic function during the operation.