QS Study

Bradycardia means abnormally slow heart action; decreased heart rate less than 60 beats per minute. As a result, you may feel dizzy or have chronic lack of energy, shortness of breath, or even fainting spells. It can be a serious problem if the heart doesn’t pump enough oxygen-rich blood to the body.


  • Physiological – Athletes, During sleep etc.
  • Pathological – MI, Sinus node disease, Hypothermia, Hypothyroidism, Cholestatic jaundice, intracranial pressure, Drugs eg. β-antagonist verapamil etc.
  • Imbalance of chemicals in the blood, such as potassium or calcium

Fig: Bradycardia – slow heart action


Bradycardia is when the heart beats slower than normal; symptoms include:

  • angina (chest pain)
  • shortness of breath
  • trouble concentrating or confusion
  • difficulties when exercising
  • dizziness
  • lightheadedness
  • palpitations
  • diaphoresis, or sweating
  • easily tiring during physical activity


The most efficient way to avert bradycardia is to decrease your danger of developing heart disease. If you previously have heart disease, check it and follow your conduct plan to lower your risk of bradycardia. Take the following steps:

  • Exercise and eat a healthy diet.
  • Maintain a healthy weight.
  • Keep blood pressure and cholesterol under control.
  • Don’t smoke.
  • Don’t use recreational drugs.
  • Manage stress.
  • Go to scheduled checkups.