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Objective Evaluate the impact of 82-Rubidium positron emission tomography (PET) myocardial perfusion imaging (MPI) availability on patient management presenting at the emergency department (ED) with chest pain (CP). Methods This is a single-center retrospective study of clinical databases. Patients presenting with CP with a non-definitive suspicion of acute coronary syndrome (ACS) at the ED between April 2016 and February 2020 were divided into 2 groups based on PET availability. The proportion of invasive coronary angiography (ICA) without significant coronary artery disease (CAD), length of stay (LoS), and additional downstream testing were evaluated. Results There were 21,242 ED visits for CP without definitive ACS: 5,492 when PET is not available and 15,750 when PET is available. When PET is available, proportion of patients undergoing a MPI study was greater (20.7% vs 17.6%,  P &lt;0.0001), proportion of ICA without significant CAD was similar (18.5% vs 21.4%,  P =0.24), and median ED LoS was shorter (16.6 vs 18.1 hours,  P =0.03). Patients undergoing SPECT MPI had significantly more downstream testing (8.9% vs 6.4%,  P =0.003) and a higher rate of coronary angiogram without significant CAD (21.2% vs 14.2%,  P =0.09) compared to those who underwent PET MPI. Conclusion Availability of PET MPI was associated with an increased number of MPI referral from the ED, similar rates of ICA without significant CAD, decreased LoS, and fewer downstream testing.

Impact of rubidium imaging availability on management of patients with acute chest pain