Cardiac viability determined by imaging studies, one to assess perfusion and a second to assess metabolism.

Areas of "mismatch" indicate tissue that will potentially benefit from revascularization procedures (i.e., angioplasty or by-pass graft).

57 yr old man. Hx ant wall infarct. Cath: total occlusion mid LAD and Cx; 80% distal RCA and 50% obtuse marginal occlusion .