<unk>  is a problem with the electrical conduction of the heart, specifically the three fascicles that carry electrical signals from the atrioventricular node to the ventricles. The three fascicles include the right bundle branch, the left anterior fascicle and the left posterior fascicle. The left anterior fascicle and left posterior fascicle are together referred to as the left bundle branch. "Block" at any of these levels can cause an abnormality on an electrocardiogram The most literal meaning of<unk>  is complete heart block: all three fascicles are blocked. A second, and clinically distinct, definition of<unk>  is a circumstance in which right bundle branch block (RBBB) and left bundle branch block occur in the same patient, but at distinct points in time. For example, a patient that is found to have a RBBB one day and a LBBB another can be said to have "alternating bundle branch blocks". In this context, because all three fascicles show evidence of block at different points in time, the term<unk>  is often used. Finally, the third meaning of<unk>  refers to a specific finding on an electrocardiogram in which bifascicular block is observed in a patient with a prolonged PR interval (first degree AV block). The treatment of<unk>  is highly dependent on which clinical entity (one of the three above) is being described.
Trifascicular block
Bifascicular block
Fascia iliaca block
Brachial plexus block
Transverse abdominis plane block
Paracervical block
Spinal manipulation
Nerve induction