Patient(38) COVID-19(36) Case report(25) coronavirus disease(22) surgical(19) hospital(18) performed(16) Treatment(14) Mortality(13) Cardiac surgery(13) outcome(13) pandemic(13) COVID-19 pandemic(12) Thrombus(11) treated(11) postoperative(10) Pneumonia(10) required(9) diagnosed(8) reported(8) Admission(8) significantly(8) Coronavirus disease 2019(8) cardiac(7) Result(7) Complication(7) cardiovascular disease(7) mortality rate(7) disease(7) patients with COVID-19(7)