Cardiac Events and Gated SPECT MPI Findings in “False-Negative Scans”
| False-negative MPI events | Gated SPECT MPI findings | Timing of injection |
|---|---|---|
| PCI 3 d after MPI: LCx, 70% midvessel stenosis | Normal perfusion and function | CP resolved for >3 h |
| PCI 3 d after MPI: LCx, 90% stenosis; LAD, 20% stenosis; RCA, 50% stenosis | Normal perfusion and function | CP resolved for 4 h |
| NSTEMI on same day as MPI | Normal perfusion and function | CP resolved for 5 h |
LCx = left circumflex coronary artery; LAD = left anterior descending artery; RCA = right coronary artery; NSTEMI = non–ST-elevation myocardial infarction.