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Low-Dose Dobutamine Electrocardiograph-Gated Myocardial SPECT for Identifying Viable Myocardium: Comparison with Dobutamine Stress Echocardiography and PET

Departments of Nuclear Medicine, Cardiovascular Medicine, and Tracer Kinetics, Hokkaido University School of Medicine, Sapporo, Japan

View larger version (14K): [in a new window]   FIGURE 1. Segmental evaluation pattern for DSE, DS SPECT, and FDG positron emission tomograms. A = anterior; AA = anterior apex; AI = inferior apex; AS = anteroseptal; I = inferior; L = lateral; P = posterior; S = septal.

View larger version (83K): [in a new window]   FIGURE 2. Representative images from 70-y-old man with inferior myocardial infarction. (A) Inferior segment was considered viable on basis of FDG PET findings. (B) Inferior segment had severe hypokinesis in resting gated SPECT image. (C) Dobutamine stress improved wall motion abnormality. ED = end-diastole; ES = end-systole.

View larger version (80K): [in a new window]   FIGURE 3. Representative images from 72-y-old woman with anteroseptal myocardial infarction. (A) Anteroseptal segment was considered not viable on basis of FDG PET findings. (B) Anteroseptal segment showed severe hypokinesis on resting gated SPECT image. (C) No improvement in wall motion was observed during dobutamine infusion. ED = end-diastole; ES = end-systole.