Incomplete Left Bundle Branch Block by ECG Finding

**Semantic type:** Finding

**Definition:** An electrocardiographic finding of a wide QRS complex with evidence of delayed conduction to the left ventricle, manifest as a widened initial portion of the QRS complex in leads V5, V6, I and aVL and with QRS duration less than 120 ms. (CDISC)

**Synonyms:** - INCOMPLETE LEFT BUNDLE BRANCH BLOCK - Incomplete Left Bundle Branch Block - Incomplete Left Bundle Branch Block by EKG Finding - Incomplete left bundle branch block