Doctors do not treat left bundle branch block specifically, states Mayo Clinic; however, if heart disease is the cause, cardiologists and cardiovascular surgeons treat the disease, notes Cleveland Clinic. As individuals grow older, their risk of developing left bundle branch block increases, although right bundle branch block occurs more often.
A bundle branch block hinders the electrical impulses that control the heartbeat from traveling throughout the heart correctly. Doctors use electrocardiograms to diagnose left bundle branch block, and they look for heart disease when signs of blocks appear. Patients do not need treatment if they do not have heart disease or its symptoms and have no other electrical conduction system blocks, explains Cleveland Clinic. Cardiologists prescribe pacemakers for patients with heart blocks or blockage symptoms.