What are the causes of first degree atrioventricular block?

Causes of first degree atrioventricular block

  • lschaemic heart disease
  • Cardiac conduction tissue disease (sinoatrial disease)
  • Rheumatic fever
  • Myocarditis
  • Drugs
  • Hypokalaemia
  • Athlete's heart 

[The ECG Fig is from Davidson's Principles and Practice of Medicine 23 edition]

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