User:Mr. Ibrahem/Bundle branch block

A bundle branch block is a defect in one of the bundle branches of the electrical conduction system of the heart. It may result in a partial or complete inability for an electrical signal to travel through that branch. It generally does not result in symptoms.

There are two main types right bundle branch block (RBBB) and left bundle branch block (LBBB). A RBBB may be a normal variation, occur as a result of a prior heart attack, or from a pulmonary embolism. And LBBB may indicate coronary artery disease.

Diagnosis is by electrocardiogram (ECG) with a QRS complex of greater than 120 ms. Other rhythms that may appear similarly include ventricular tachycardia, a run of premature ventricular contractions (PVCs), Brugada syndrome, left anterior fascicular block, left posterior fascicular block, and trifascicular block. No specific treatment is required.