Bradycardia electrocardiogram

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: M.Umer Tariq [2] Ibtisam Ashraf, M.B.B.S.[3]

Overview

An ECG may be helpful in the diagnosis of bradycardia. An upright P wave in leads I, II, and aVL, and a negative P wave in lead aVR, indicates a sinus origin of the bradycardia. It is vital to exclude other causes of bradyarrhythmia's such as AV block.

An ECG may be helpful in the diagnosis of bradycardia. Findings on an ECG diagnostic of bradycardia include:
- The heart rate is < 60 beats per minute.
- An upright P wave in leads I, II, and aVL.
- A negative P wave in lead aVR, indicates a sinus origin of the bradycardia.

The diagnosis is usually made with the help of a 24-hour ambulatory electrocardiogram (ECG) or telemetry.