Neonatal atrial flutter is a rare entity seen in the newborn period. With prompt treatment, they mostly revert to normal rhythm, with good long-term prognosis. But prolonged untreated atrial flutter can result in heart failure. This necessitates prompt diagnosis and treatment of the condition. However, all available treatment modalities are not effective in all patients. Here, we report 2 newborns with atrial flutter who did not respond initially to medical management, but eventually responded to cardioversion, with good outcome.