title: Acute sinus arrhythmia during surgery in the fourth ventricle: an indicator of brain-stem irritation.
mesh_terms: D000208:Acute Disease; D000328:Adult; D001146:Arrhythmia, Sinus / Q000209:etiology* / Q000503:physiopathology; D001254:Astrocytoma / Q000601:surgery*; D001794:Blood Pressure; D001933:Brain Stem / Q000293:injuries* / Q000503:physiopathology; D002551:Cerebral Ventricle Neoplasms / Q000601:surgery*; D002648:Child; D003388:Cranial Fossa, Posterior; D005260:Female; D006339:Heart Rate; D006801:Humans; D007431:Intraoperative Complications