Standardised right ventricular perfusion images used for segmental analysis in patients with congenitally corrected TGA. (A) Transaxial (cross sectional) view. Standardised right ventricular perfusion images used for segmental analysis in patients with congenitally corrected TGA. (A) Transaxial (cross sectional) view. (B) Vertical long axis view. (C) Horizontal long axis view. S, septum; An, anterior wall; L, lateral wall; I, inferior wall; Ap, apex. T S Hornung et al. Heart 1998;80:322-326 Copyright © BMJ Publishing Group Ltd & British Cardiovascular Society. All rights reserved.