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BC63.41 Left posterior fascicular block

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

Disorder of the atrioventricular conduction system characterised by right axis deviation for age (between 90° and 180° in adults), with a qR pattern in inferior leads, rS pattern in leftward leads (I and aVL), 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

• Left posterior fascicular block
• left fascicular posterior bundle branch block
• posterior fascicular block

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