cause of bradycardia
Common causes of bradycardia include: 1  Congenital heart disease (i.e., condition you were born with) 2  Certain side effects or heart medications. 3  The natural aging process.  Scar tissue from a heart 1  attack. Sick sinus syndrome, also called sinus node dysfunction (the heartâs natural pacemaker not functioning correctly)
Bradycardia can be caused by: 1  Changes in the heart that are the result of aging. 2  Diseases that damage the heart's electrical system. These include coronary artery disease, heart attack, and infections such as endocarditis and myocarditis. 3  Conditions that can slow electrical impulses through the heart.