per-KIN-gee FI-berz Muscle fibers that branch from the atrioventricular node and transmit electrical stimulation rapidly in the heart. 722

Specialized cardiac muscle cells responsible for efficient electrical stimulation of the heart during contraction. The cells are larger in diameter than normal cardiac muscle cells and have fewer myofibrils.

The final electrical conduit in the circuit, the Purkinje Fibers are located in the ventricle walls and help to trigger ventricular contraction.

Specialized cardiac muscle fibers inolved in the transmission of the impulse from the atrioventricular node to the ventricles

Purkinje fibers (or Purkyne tissue) are located in the inner ventricular walls of the heart, just beneath the endocardium. These fibers are specialized myocardial fibers that conduct an electrical stimulus or impulse that enables the heart to contract in a coordinated fashion.