INTRODUCTION
Humanity is still at war with the coronavirus disease-2019 (COVID-19) since the first outbreak of the severe respiratory syndrome coronavirus 2 in December 2019. Cases are still rising and mortality is still occurring. Many clinical reports on COVID-19 and various data about cardiac arrhythmia are in existence. However, the association with cardiac arrhythmia and its mechanism should be acknowledged. The COVID-19 pandemic was experienced in Daegu, Korea between March and May 2020. Several clinical features were experienced during the treatment of the COVID-19 infection including cardiac arrhythmia. The first case of a paroxysmal complete atrioventricular block is herein presented to share the course of treatment.