ICD-11 MMS

11 Diseases of the circulatory system

Cardiac arrhythmia  (BC60-BC9Z)

BC63 Conduction disorders

BC63.4 Left bundle branch block

BC63.40 Left anterior fascicular block

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01


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)

synonyms

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