7, and the declaration was extended nationwide on April 16, 2020. A total of 11,919 cases and 287 deaths have been confirmed in Japan as of April 23, 2020 [4]. Exhaustion of healthcare resources, including medical personnel, medical equipment, and personal protective equipment (PPE), is occurring in many regions while dealing with patients with COVID-19. Recent studies showed that cardiovascular comorbidities are common in patients with COVID-19 and such patients are at a higher risk of morbidity and mortality [5,6]. In addition, various cardiac manifestations, such as myocarditis, venous thrombosis, arrhythmia, and heart failure were reported in patients with