title: Clinical observations on 76 cluster headache cases.
abstract: 76 cases of cluster headache are reviewed. Besides confirming established notions, the present study calls attention to the following points: (a) the peculiar behaviour of patients during the attacks does not appear explainable in simple terms of reaction to pain; (b) the occurrence of ECG abnormalities during the attacks in addition to bradycardia; (c) the well-known tendency of cluster headache attacks to recur at the same time of day, has in our cases a very high peak at 3 p.m., and (d) when the attacks occur in sleep hours, the time relationship with REM sleep stage is confirmed in our cases which have been recorded at night.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001919:Bradycardia / Q000150:complications; D003027:Cluster Headache / Q000150:complications / Q000175:diagnosis* / Q000453:epidemiology; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010146:Pain; D010507:Periodicity; D012895:Sleep, REM; D014653:Vascular Headaches / Q000175:diagnosis*