Introduction:

Atrial flutter is a rare type of fetal and neonatal arrhythmia. Although it can lead to serious morbidities such as fetal hydrops or even death, diagnosis and early treatment confer a good prognosis in most cases.

Patients and methods:

Three cases of atrial flutter are presented, two of which start in the fetal period and one in the neonatal period. The literature is reviewed in relation to the clinical, diagnostic and therapeutic characteristics of fetal and neonatal atrial flutter.

Results and discussion:

In fetal atrial flutter maternal therapy with antiarrhythmic drugs is the most used treatment during pregnancy. The most used postnatal treatment is synchronized electrical cardioversion. Atrial flutter does not usually associate structural heart disease, neonatal recurrence is uncommon and usually does not require prophylactic treatment.

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