title: Anatomy, histology, and pathology of the cardiac conduction system--Part VI.
abstract: Various pathologic conditions producing atrioventricular block are reviewed. Calcific atrioventricular block (aortic stenosis, mitral valve annular calcium), active infective endocarditis ("ring" abscess), acute and healed myocarditis, various collagen-vascular diseases, amyloidosis, and tumors are reviewed as causes of atrioventricular block. Various diseases producing bundle-branch block are also discussed.
authors.affiliation: Nasser, Smith and Pinkerton Cardiology, Inc. Indianapolis, Indiana.
authors.forename: B F
authors.initials: BF
authors.lastname: Waller
authors.forename: L E
authors.initials: LE
authors.lastname: Gering
authors.forename: N A
authors.initials: NA
authors.lastname: Branyas
authors.forename: J D
authors.initials: JD
authors.lastname: Slack
mesh_terms: D006327:Heart Block / Q000209:etiology / Q000473:pathology*; D006329:Heart Conduction System / Q000033:anatomy & histology / Q000473:pathology*; D006801:Humans