ECG: PR interval

Question 1

What are some causes of a prolonged PR interval?

Answer 1

• Idiopathic
• Ischaemic heart disease
• Digoxin toxicity
• Hypokalaemia
• Rheumatic fever
• Aortic root pathology (e.g. Abscess secondary to endocarditis)
• Lyme disease
• Sarcoidosis
• Myotonic dystrophy