Fig. (1) Definition of attenuation defects. A.Anterior wall attenuation was defined as reduced activity in the anterior segments with or without involvement of the anterolateral and/or anteroseptal segments. B.Inferior wall attenuation was defined as reduced activity in the inferior segments with or without involvement of the inferoseptal and/or inferolateral segments. C.Lateral wall attenuation was defined as reduced activity in the inferolateral and/or anterolateral segments, but sparing the anterior and inferior segments. Reprinted with permission (Chawla D et al. J Nucl Cardiol. 2011 [7]).