Hello. Thank you for posting.
Bradycardia is a slower than normal heart rate. The hearts of adults at rest usually beat between 60 and 100 times a minute. If you have bradycardia, your heart beats fewer than 60 times a minute.
Bradycardia can be caused by:
Heart tissue damage related to aging
Damage to heart tissues from heart disease or heart attack
Heart disorder present at birth (congenital heart defect)
Infection of heart tissue (myocarditis)
A complication of heart surgery
Underactive thyroid gland (hypothyroidism)
Imbalance of chemicals in the blood, such as potassium or calcium
Repeated disruption of breathing during sleep (obstructive sleep apnea)
Inflammatory diseases, such as rheumatic fever or lupus
Medications, including some drugs for other heart rhythm disorders, high blood pressure and psychosis