Key facts about a slow heartbeat

Bradycardia is a condition in which the heart rate slows down below the normal level, with fewer than 60 beats per minute in adults. In some cases, symptoms may not appear, but it can cause fatigue, dizziness, shortness of breath, and fainting if the heart does not supply enough blood and oxygen to vital organs. Causes include damage to the heart's electrical conduction system, heart diseases, thyroid disorders, use of certain medications, sleep disorders, and changes in electrolyte levels in the body. Diagnosis requires tests such as an electrocardiogram (ECG) and long-term monitoring exams. In severe or symptomatic cases, a pacemaker may be recommended to increase heart rate and improve its function. Treatment depends on the underlying cause and the severity of symptoms and may involve lifestyle changes, medication adjustments, or surgical procedures such as pacemaker implantation.

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