BC63.1

ICD-11 MMS 2026-01

Atrioventricular block, second degree

Description

Disorder of the atrioventricular conduction system in which some but not all atrial impulses fail to propagate to the ventricles. Electrocardiographically, some P waves are not followed by a QRS complex.

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
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  • 19 – Certain conditions originating in the perinatal period
  • 20 – Congenital malformations, deformations and chromosomal abnormalities
  • 22 – Injury, poisoning or certain other consequences of external causes

Child codes

  • BC63.10 – High-grade second degree atrioventricular block
  • BC63.1Y – Other specified atrioventricular block, second degree
  • BC63.1Z – Atrioventricular block, second degree, unspecified

Sibling codes

  • BC63.0 – Atrioventricular block, first degree
  • BC63.2 – Complete atrioventricular block
  • BC63.3 – Right bundle branch block
  • BC63.4 – Left bundle branch block
  • BC63.5 – Nonspecific intraventricular conduction delay
  • BC63.Y – Other specified conduction disorders
  • BC63.Z – Conduction disorders, unspecified

Foundation entity

Atrioventricular block, second degree – http://id.who.int/icd/entity/821174901

Part of: BC63: Conduction disorders › 11: Diseases of the circulatory system