[Association of cardiovascular disease with hospital mortality in COVID-19 patients]

To evaluate the relationship between the in-hospital mortality of patients with COVID-19 and the history of cardiovascular disease (CVD) using data from the Russian registry of patients with COVID-19.

This study included 758 patients with COVID-19 (403 men, 355 women) aged from 18 to 95 years (median, 61 years), successively hospitalized in the COVID hospital of the Chazov National Medical Research Center of Cardiology from April through June 2020. Death predictors were studied using single- and multivariate regression analyses with the SPSS Statistics, Version 23.0 software.

During the stay in the hospital, 59 (7.8 %) patients with COVID-19 died, 677 (89.3 %) were discharged, and 22 (2.9 %) were transferred to other hospitals. The univariate regression analysis showed that the increase in age per decade was associated with a 92% increase in the risk of death [relative risk (RR), 1.92; 95% confidence interval (CI), 1.58-2.34; p <0.001], and an increase in the number of CVDs increases the risk of death by 71% (RR 1.71; 95% CI 1.42-2.07; p<0.001). The presence of one or more CVDs or specific diseases [atrial fibrillation, chronic heart failure (CHF), ischemic heart disease, myocardial infarction, history of cerebrovascular accidents], as well as diabetes mellitus were associated with a higher risk of fatal outcome during the hospitalization for COVID-19. The presence of any CVD increased the risk of in-hospital death by 3.2 times. However, when the model was adjusted for age and sex, this association lost its strength, and only the presence of CHF was associated with a 3-fold increase in the risk of death (RR, 3.16; 95 % CI, 1.64-6.09; p=0.001). Age was another independent predictor of death (RR, 1.05; 95 % CI, 1.03-1.08; p < 0.001).

A history of CVD and the CVD number and severity are associated with a higher risk of death during the hospitalization for COVID-19; the independent predictors of in-hospital death are an age of 80 years and older and CHF.