bradycardia causes
Causes of bradycardia. Bradycardia can happen when: Changes occur in the heart due to ageing. Certain diseases damage the heartâs electrical system, such as coronary heart disease, heart attack, diphtheria or myocarditis.
One of the most common pathologic causes of symptomatic sinus bradycardia is the sick sinus syndrome. The most common medications responsible include therapeutic and supratherapeutic doses of digitalis glycosides, beta-blockers, and calcium channel-blocking agents.
The pathophysiology of sinus bradycardia is dependent on the underlying cause.Commonly, sinus bradycardia is an incidental finding in otherwise healthy individuals, particularly in young adults, athletes or sleeping patients.Other causes of sinus bradycardia are related to increased vagal tone.