Representative short axis (top row) vertical long axis (middle row) and horizontal long axis (bottom row) tomograms from the resting Tc-99m sestamibi scans of two patients referred for assessment of viability in the left anterior descending (LAD) coronary

Both patients had heart failure and extensive regional akinesis in the LAD territory. Patient A has minimal tracer uptake in the septum, apex, and anterior wall (white arrows) indicating predominantly scar tissue. Patient B has significant uptake of tracer in the septum and anterior wall (yellow arrows) indicative of the presence of viable myocardium, and predominantly scar in the apex. The inferior wall that was also dyskinetic shows only modest tracer uptake (extracardiac tracer activity in overlying gut is also seen).