Aim: Covid-19 mortality rate varies according to age and the presence of chronic disease. In this study, demographic characteristics, comorbidities, presenting symptoms, physical examination findings, laboratory findings, and administered drugs of the discharged or deceased patients admitted to our hospital and hospitalized with the COVID-19 diagnosis were compared to investigate the factors that affect mortality Methods: A retrospective study was performed and included COVID-19 pneumonia patients. 390 consecutive discharged or deceased patients, who were hospitalized in our hospital between March 20 and May 20, 2020, after detection of pneumonia and diagnosis of COVID-19, were included in the study. Result: Of the 390 patients included in the study, 352 (90.25%) were discharged after recovery, while 38 (9.75%) were deceased. The average age of all the patients was 49.46±17,86, the average age of the discharged patients was 47.19±16.76, and the average age of the deceased patients was 70.42±13.7. The average age of deceased patients was significantly higher. Of all the patients, 40.8% was PCR positive Conclusion: The present study revealed that the drugs that patients take due to their comorbidities have no effect on the prognosis of the disease and that the presence of comorbidity itself is indicative of the poor prognosis. Taking into account the PCR positivity of 57.9%, even in deceased patients, we believe PCR is inadequate in the diagnosis, and CT is much more valuable in this regard.

Aim: The common cardiac toxicities of hydroxychloroquine (HCQ) and azithromycin(AZ) are not well defined in COVID -19 patients . The purpose of this study was to evaluate ventricular repolarization in COVID-19 patients treated with HCQ and AZ using iCEB, Tp-e interval, Tp-e/QT ratio, and Tp-e/QTc ratio. Methods: This retrospective study enrolled 164 patients diagnosed with COVID-19 pneumonia in the Emergency Department (ED) and then transferred to the medical floor or ICU in April 2020 Result: A total of 164 patients were mean aged 47 ± 18 years (range, 18-97 years) and 83 (50.6%) were women in study population. Group HTQ had 38 patients , Group HTQ + AZ had 126 patients. On the 5th day of hospitalization heart rates (HR) were significantly lower than ED (p<0,001). On the 5th day of hospitalization QTc , QT max (V5-V6), QTmin, Tp-e (V5-V6) and iCEB values were significantly higher than ED (p=0,01and all the rest p<0,001 respectively). On the 5th day of hospitalization iCEB values of HTZ+AZ group were statistically significant higher than iCEB values of HTQ group (p=0,03). iCEBc had strong correlation between Tp-e/QT (V5). iCEBc had strong negative correlation between Tp-e (V5). Conclusion: The iCEB values were significant increased after HTQ and AZ treatment in COVID-19 patients. We think that iCEB is a more sensitive marker than QT prolongation in predicting the risk of multi-drug arrhythmia.