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Systemic Diseases and Heart Block

Syed Rafay A Sabzwari1, Wendy S Tzou2

  • 1University of Colorado Anschutz Medical Campus, 12631 East 17th Avenue, Mail Stop B130, Aurora, CO 80045, USA.

Rheumatic Diseases Clinics of North America
|June 28, 2024
PubMed

Insights

Younger patients with heart block require evaluation for systemic diseases like infiltrative, rheumatologic, endocrine, or neuromuscular disorders. Early diagnosis of these conditions is crucial for effective management.

Area of Science:

  • Cardiology
  • Internal Medicine
  • Systemic Diseases

Background:

  • Systemic diseases can affect the myocardium and cardiac conduction system, leading to heart block.
  • Heart block in younger patients (<60 years) warrants investigation for underlying systemic causes.

Purpose of the Study:

  • To review the classification and mechanisms of systemic diseases causing heart block.
  • To emphasize the importance of evaluating younger patients for systemic causes of heart block.

Main Methods:

  • Literature review of systemic diseases associated with heart block.
  • Classification of systemic disorders into infiltrative, rheumatologic, endocrine, and neuromuscular categories.

Main Results:

  • Infiltrative diseases (cardiac amyloidosis, sarcoidosis) can infiltrate the conduction system.
  • Rheumatologic disorders (atherosclerosis, vasculitis, myocarditis) contribute to heart block.
  • Hereditary neuromuscular diseases (myotonic, Becker, Duchenne dystrophies) can involve the myocardium and cause heart block.

Conclusions:

  • Systemic diseases are a significant cause of heart block, particularly in younger individuals.
  • Comprehensive evaluation for systemic disorders is essential in patients presenting with heart block.

Keywords:
AmyloidosisAtrioventricular nodeHeart blockMuscular dystrophiesRheumatologic disordersSarcoidosisSystemic lupus erythematosusThyroid disorders

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