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Table 44.4

Causes of Atrioventricular (AV) Block

Acute
  • High vagal tone (may cause Mobitz type 1 second-degree AV block, but not Mobitz type 2 or complete AV block)
  • Myocardial ischaemia/infarction
  • Drugs (beta blockers, digoxin, diltiazem, verapamil, other antiarrhythmic drugs)
  • Hyperkalaemia
  • Infections: Lyme disease
  • Myocarditis
  • Infective endocarditis with aortic root abscess
Chronic