Typical atrial flutter

This code represents a supraventricular arrhythmia characterized by a rapid, regular atrial rate, typically between 250-350 beats per minute, with a classic "sawtooth" pattern on the electrocardiogram (ECG). It is caused by a re-entrant circuit within the right atrium, often involving the cavotricuspid isthmus. Patients may experience palpitations, shortness of breath, chest pain, or fatigue.

Use this code when documentation clearly indicates a diagnosis of typical atrial flutter, also known as type I atrial flutter. This diagnosis is typically confirmed by ECG findings showing the characteristic sawtooth waves, especially in leads II, III, and aVF. Support for this code includes physician notes detailing the ECG interpretation and the clinical presentation consistent with atrial flutter.

• Differentiate from atypical atrial flutter (I48.4) which involves different re-entrant circuits and ECG patterns.
• Always review the ECG interpretation and physician's diagnostic statement to confirm "typical" atrial flutter.
• Code any associated conditions, such as heart failure or valvular disease, as secondary diagnoses.