Abstract 16056: The Prevalence, Risk Factors and Outcome of Cardiac Dysfunction in Hospitalized Patients With Covid-19

Abstract

Objectives: We aimed to investigate the prevalence, risk factors and outcome of cardiac dysfunction, and explore the potential value of echocardiographic parameters in hospitalized patients with coronavirus disease 2019 (COVID-19). Background: Cardiac involvement is a prominent features in COVID-19. However, the prevalence and clinical significance of cardiac dysfunction in COVID-19 patients have not yet been well described. Methods: We studied 157 consecutive hospitalized COVID-19 patients, whose Left ventricular (LV) and right ventricular (RV) structure and function were evaluated by echocardiography. Results: RV dysfunction was found in 40 (25.5%) patients, and LV dysfunction in 28 (17.8%) patients consisting of 24 (15.3%) with heart failure with preserved ejection fraction and 4 (2.5%) with heart failure with reduced ejection fraction. Hypertension, acute respiratory distress syndrome (ARDS), high-sensitivity troponin I (hs-TNI) level and mechanical ventilation therapy was associated with cardiac dysfunction, which contributed to higher mortality (LV dysfunction: 28.6% vs 11.6%, P = 0.022; RV dysfunction: 37.5% vs 6.8%, P < 0.001, respectively). Moreover, LV and RV dysfunction were more frequent in patients with elevated hs-TNI than those without (37.5% vs 12.5 %, P = 0.001; 40.0 % vs 22.9%, P = 0.043, respectively). During hospitalization, 23 patients died. The mortality was 3.0% for patients without cardiac dysfunction and normal hs-TNI levels, 6.7% for those with cardiac dysfunction and normal hs-TNI levels, 13.3% for those without cardiac dysfunction but elevated hs-TNI levels, and 64.0% for those with cardiac dysfunction and elevated hs-TNI. In Cox analysis, RV dysfunction was independently predictor of higher mortality (hazard ratio=2.79; 95% CI: 1.10 to 7.06; P=0.031). HF, especially HFpEF, was not predictive of increased mortality. Conclusions: The prevalence of RV dysfunction was higher than that of HF. Moreover, HFpEF was more common than HFrEF. RV dysfunction is an independent predictor of higher mortality. Additionally, patients with cardiac dysfunction and elevated hs-TNI had the highest mortality, which may prompt physicians to pay attention not only to the hs-TNI level but also the cardiac dysfunction.