David M. Dudzinski, MD, FACC, provides an overview of Massachusetts General Hospital's work to fight the COVID-19 epidemic in Boston, including converting outpatient cardiovascular services to telehealth and telephone to maintain CV care while reducing the risk of viral transmissions. On the in-patient side, MGH's cardiac ICU was the first non-MICU unit to convert entirely to a COVID unit and was at capacity by March 31.