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Erschienen in:
10.12.2021 | Images that Teach
Severe myocardial stunning after myocardial perfusion on gated SPECT exercise stress test
Erschienen in: Journal of Nuclear Cardiology | Ausgabe 2/2023
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Myocardial stunning occurs when myocardial contractile function does not instantaneously recover after reperfusion.1 It is often studied in nuclear stress tests through changes in left ventricular ejection fraction (LVEF) and end-diastolic dysfunction post-stress. A change in LVEF on PET imaging >5% has been associated with increased incidence of severe coronary artery disease.2 On SPECT imaging, drop in LVEF on stress is less prognostic and it has been suggested that a new definition for post-stress reduction in LVEF is needed to improve its predictive accuracy.3 There is limited investigation into patients with larger changes in LVEF with gated SPECT MPI. Here we present a case of severe post-stress stunning after a myocardial exercise stress test (Figure 1).
Figure 1
ECG at start of recovery reveals ST depressions in the inferior and lateral leads
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