P1781An observational study assessing the value of computed tomography cardiac angiography (CTCA) in planning invasive angiographic procedures in patients with previous coronary artery bypass grafts (CABG). (28th August 2018) - Castle, E V; Rathod, K; Treibel, T; Davies, C; Guttmann, O; Curtis, M; Knight, C; Moon, J; Smith, E; Weerackody, R; Bourantas, C; Wragg, A; et al.