(A) Preoperative 2D TOE with and without colour Doppler, (B) preoperative 3D TOE, (C) preoperative 3D TOE colour Doppler, (D) postoperative 2D TOE with and without colour Doppler, (E) postoperative 3D TOE and (F) postoperative 3D TOE with colour Doppler. TOE: transoesophageal echocardiography.