Diseases

Heart Block

Impaired conduction of cardiac impulse that can occur anywhere along the conduction pathway, such as between the SINOATRIAL NODE and the right atrium (SA block) or between atria and ventricles (AV block). Heart blocks can be classified by the duration, frequency, or completeness of conduction block. Reversibility depends on the degree of structural or functional defects.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Impaired conduction of cardiac impulse that can occur anywhere along the conduction pathway, such as between the SINOATRIAL NODE and the right atrium (SA block) or between atria and ventricles (AV block). Heart blocks can be classified by the duration, frequency, or completeness of conduction block. Reversibility depends on the degree of structural or functional defects.

MeSH Record

Classification

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MeSH Record

Synonyms

17 entry terms
  • Block, Heart
  • Blocks, Heart
  • Heart Blocks
  • A-V Dissociation
  • Atrioventricular Dissociation
  • Auriculo-Ventricular Dissociation
  • A V Dissociation
  • A-V Dissociations
  • Atrioventricular Dissociations
  • Auriculo Ventricular Dissociation
  • Auriculo-Ventricular Dissociations
  • Dissociation, A-V
  • Dissociation, Atrioventricular
  • Dissociation, Auriculo-Ventricular
  • Dissociations, A-V
  • Dissociations, Atrioventricular
  • Dissociations, Auriculo-Ventricular

MeSH Record

Aspects Covered

35 allowable subheadings

Indexed with the subheadings blood, cerebrospinal fluid, chemically induced, classification, complications, congenital, diagnosis, diagnostic imaging, diet therapy, drug therapy, economics, embryology, enzymology, epidemiology, ethnology, etiology, genetics, history, immunology, metabolism, microbiology, mortality, nursing, parasitology, pathology, physiopathology, prevention & control, psychology, radiotherapy, rehabilitation, surgery, therapy, urine, veterinary, virology.

MeSH Hierarchy

Tree Numbers

MeSH Record

NLM Classification

WG 330.5.H4

AMA Style

References

  1. National Library of Medicine. Heart Block. Medical Subject Headings (MeSH). 2026. Unique ID D006327. http://id.nlm.nih.gov/mesh/2026/D006327
  2. Heart Block. In: Wikipedia. https://en.wikipedia.org/wiki/Heart_block
  3. Heart Block. In: Wikidata. https://www.wikidata.org/wiki/Q1361515