Bundle branch block 2012-04-11T07:55:50Z HP:0011710 The Bundle of His conducts the electrical impulse from the atrioventricular node into the ventricles. The Bundle of His divides into right and left bundle branches. A universal feature of a bundle branch block is a prolongation of the time required for depolarization of a portion of the ventricles, reflected in an abnormality of the QRS complex. Block of conduction of electrical impulses along the Bundle of His or along one of its bundle branches. SNOMEDCT_US:6374002 Bundle-branch block UMLS:C0006384 Heart block