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Back to Cardiovascular Diseases

Sinus bradycardia

In sinus bradycardia, electrical activity originates from the sinus node area but does so with a slow rate (<60 bpm).

ECG readings

The ECG reveals an atrial rate of less than 60, P waves with a normal configuration and axis, and otherwise normal baseline, PR interval, QRS, and ST-T wave pattern.


Asymptomatic patients require no therapy. In symptomatic patients, therapy is directed toward the underlying etiology, and treatment includes atropine, or cardiac pacing.

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