ventriculoatrial shunt /ventrik′yəlō·ā″trē·əl/ [L, ventriculus + atrium, hall; ME, shunten] , a surgically created passageway consisting of plastic tubing and one-way valves, implanted between a cerebral ventricle and the right atrium of the heart to drain excess cerebrospinal fluid from the brain in hydrocephalus.
