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Systemic Diseases and Heart Block.

PMID: 34689899 (view PubMed database entry)
DOI: 10.1016/j.ccep.2021.06.011 (read at publisher's website )

Syed Rafay A Sabzwari, Wendy S Tzou,

Systemic diseases can cause heart block owing to the involvement of the myocardium and thereby the conduction system. Younger patients (<60) with heart block should be evaluated for an underlying systemic disease. These disorders are classified into infiltrative, rheumatologic, endocrine, and hereditary neuromuscular degenerative diseases. Cardiac amyloidosis owing to amyloid fibrils and cardiac sarcoidosis owing to noncaseating granulomas can infiltrate the conduction system leading to heart block. Accelerated atherosclerosis, vasculitis, myocarditis, and interstitial inflammation contribute to heart block in rheumatologic disorders. Myotonic, Becker, and Duchenne muscular dystrophies are neuromuscular diseases involving the myocardium skeletal muscles and can cause heart block.

Card Electrophysiol Clin (Cardiac electrophysiology clinics)
[2021, 13(4):721-740]

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