Valve insufficiency in ventriculoatrial shunts.
D002508:Cephalometry; D002552:Cerebral Ventricles / Q000601:surgery*; D002557:Cerebrospinal Fluid Shunts; D002648:Child; D006801:Humans; D006849:Hydrocephalus / Q000601:surgery*; D009493:Neurosurgery / Q000295:instrumentation; D013525:Surgical Instruments / Q000592:standards*