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Funding Acknowledgements Type of funding sources: None. BACKGROUND Inducible ischemia is a strong marker of vascular vulnerability that may be a key pathogenetic determinant of COVID-19 severity. PURPOSE This study investigated the prognostic value of prior inducible ischemia on stress perfusion CMR to predict death in patients hospitalized for COVID-19. METHODS In an observational study, we retrospectively analyzed consecutive patients referred for stress perfusion CMR within last two years prior to hospitalization for COVID-19. The primary outcome was all-cause death, including in-hospital and post-hospitalisation deaths, based on the electronic national death registry. RESULTS Among the patients referred for stress perfusion CMR, 481 were hospitalized for COVID-19 (mean age =68.4 ± 9.6 years, 61.3% males) and completed the follow-up (median 73[36-101] days). There were 93 (19.3%) all-cause deaths, of which 13.7% were in-hospital and 5.6% post-hospitalisation deaths. Using Kaplan-Meier analysis, age, male gender, hypertension, diabetes, known CAD, the presence of prior inducible ischemia, the number of ischemic segments, the presence of LGE, and LVEF were significantly associated with all-cause death. In multivariable stepwise Cox regression analysis, age (HR: 1.04; 95%CI:1.01-1.07, p = 0.023), hypertension (HR: 2.77; 95%CI:1.71-4.51, p &amp;lt; 0.001), diabetes (HR: 1.72; 95%CI:1.08-2.74, p = 0.022), known CAD (HR: 1.78; 95%CI:1.07-2.94, p = 0.025) and the presence of prior inducible ischaemia  (HR: 2.05; 95%CI:1.27-3.33, p = 0.004) were independent predictors of all-cause death. CONCLUSIONS In COVID-19 patients, prior inducible myocardial ischemia by stress CMR over the last two years preceding the COVID-19 pandemic was independently associated with all-cause in-hospital and post-hospitalisation deaths, suggesting involvement of vasculature and endothelial dysfunction in the severity of COVID-19.

Prognostic value of pre-hospitalization stress perfusion CMR to predict death in patients hospitalized for COVID-19