Left anterior fascicular block

Description

Disorder of the atrioventricular conduction system characterised by left axis deviation for age (frontal plane axis between -45° and -90°), qR pattern in lead aVL, R-peak time in lead aVL of 45 ms or more, and a QRS duration that does not meet age dependent criteria for complete bundle branch block (less than 120 ms in adults, less than 100 ms in children 4 to 16 years of age, and less than 90 ms in children less than 4 years of age)

Index terms

Left anterior fascicular block
LAFB - [left anterior fascicular block]
anterior fascicular block

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left fascicular anterior bundle branch block

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

Sibling codes

BC63.41 – Left posterior fascicular block
BC63.4Z – Left bundle branch block, fascicle unspecified

Foundation entity

Left anterior fascicular block – http://id.who.int/icd/entity/1392127114

Part of: BC63.4: Left bundle branch block › BC63: Conduction disorders › 11: Diseases of the circulatory system