title: CSF hydrodynamics after subarachnoid hemorrhage.
abstract: Recent reports have shown that despite an apparently satisfactory recovery from previous subarachnoid hemorrhage (SAH), many patients still have minor sequelae when specifically looked for. The cause of this so-called post-SAH-encephalopathy is uncertain. This prospective study comprises 54 patients who underwent aneurysmal surgery after SAH between September 1978 and March 1985. One patient died, and 6 patients were non-biased drop-outs. CSF hydrodynamics, determined by infusion test and isotope cisternography, were evaluated on the remaining 47 patients in the recovery stage. Five patients (11%) were found to have typical clinical, CSF dynamic and radiological manifestations of normal pressure hydrocephalus (NPH), and all were shunted with good results. Twelve (26%) had abnormal results consistent with disturbed CSF-hydrodynamics, although there were no clinical or radiological findings supporting the diagnosis of shunt-demanding NPH. Disturbed CSF-hydrodynamics as one of the possible etiological factors of post-SAH-encephalopathy is discussed.
mesh_terms: D000328:Adult; D002555:Cerebrospinal Fluid / Q000502:physiology*; D005260:Female; D006801:Humans; D006850:Hydrocephalus, Normal Pressure / Q000209:etiology / Q000628:therapy; D002532:Intracranial Aneurysm / Q000150:complications* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011312:Pressure; D011446:Prospective Studies; D013345:Subarachnoid Hemorrhage / Q000134:cerebrospinal fluid* / Q000150:complications / Q000209:etiology