Bradycardia

Bradycardia Your Health

About This Condition

About Bradycardia (Slow Heartbeat)

Bradycardia means your heart rhythm is slow or irregular. It can cause dizziness or shortness of breath during normal activities or light exercise.

Definition

Bradycardia is defined as a slow or irregular heart rhythm, usually less than 60 beats per minute. At this rate, the heart is not able to pump enough oxygen-rich blood to your body during normal activity or exercise.


Causes

Common causes of bradycardia include:

  • A hereditary heart defect
  • Certain illnesses or heart medications
  • The natural aging process
  • Scar tissue from a heart attack
  • Sick sinus syndrome (or sinus node dysfunction)
  • The heart's natural pacemaker is not functioning correctly
  • Heart block
  • The electrical impulse that travels from the upper to the lower chamber of the heart is irregular or blocked

Symptoms

Symptoms of bradycardia include dizziness, fainting, extreme tiredness, and shortness of breath.


Risk Factors

Your risk of developing an abnormally slow heart rate (bradycardia) is greater if you:

  • Have certain types of heart disease
  • Are taking certain medicines
  • Are age 65 or older
  • Have recently had heart surgery

Diagnosis

Only your doctor can tell if you have bradycardia and how far the condition has progressed. To rule out or confirm the diagnosis of bradycardia, one or several of these diagnostic tests may be ordered depending upon the suspected heart rhythm problem:

  • Electrocardiogram (ECG)
  • Exercise ECG or stress test
  • Holter monitor (24 to 72 hour ECG)
  • Tilt table test
  • Electrophysiology (EP) study

Your doctor may also use a monitoring device to better understand the cause of unexplained fainting episodes. These monitoring devices include:

  • External loop recorder
  • Insertable loop recorder

Next: Treatment Options


This website is intended to be educational and is not to be used as a diagnostic tool. It is not intended to replace the information provided to you by your healthcare providers and does not constitute medical advice. The information may not be directly applicable for your individual clinical circumstance. Please talk with your doctor about diagnosis and treatment information.