ICD-11

Any abnormal alteration of atrio-ventricular conduction.

This category contains Atrioventricular block and left bundle branch block. AV Block is an impairment of the conduction between the atria and ventricles of the heart due to AV node dysfunction. Left bundle branch block (LBBB) is a cardiac conduction abnormality in which activation of the left ventricle is delayed. The two ventricles no longer receive the electrical impulse simultaneously and the left ventricle contracts later than the right ventricle.

Disorder of the atrioventricular conduction system characterised by a prolonged QRS duration (QRS duration greater than 110 ms in adults, greater than 90 ms in children 8 to 16 years of age, and greater than 80 ms in children less than 8 years of age) without criteria for right or left bundle branch block.