Arrhythmia diagnoses during hospitalization for COVID-19. (A) Distribution of arrhythmia types in all patients with arrhythmia during hospitalization. (B) Newly-diagnosed arrhythmia types during hospitalization. (C) Newly-diagnosed arrhythmia types in the subgroup of patients without any previous history of arrhythmia. Numbers depicted in the diagram reflect number and proportion of arrhythmia diagnoses. As one patient may have had multiple arrhythmia types, this number does not correspond to group size of patients. AF = atrial fibrillation; PVC = premature ventricular complexes; SVT = supraventricular tachycardia; VF = ventricular fibrillation; VT = ventricular tachycardia.