title: Headache, cardiac arrest, and intracranial hemorrhage.
abstract: Headache is one of the most common manifestations of non-traumatic intracranial hemorrhage, which is an uncommon, but not rare, cause of cardiac arrest in adults. History of a sudden headache preceding collapse may be a helpful clue to estimate the cause of out-of-hospital cardiac arrest (OHCA). Medical records of witnessed OHCA patients were reviewed to identify those who complained of a sudden headache preceding collapse, and the incidence of intracranial hemorrhage among them as well as their clinical characteristics was investigated retrospectively. During the 12-month period, 124 patients who sustained a witnessed OHCA were treated. Among them, 74 (60%) collapsed without any pain complaint, and only 6 (5%) complained of a sudden headache preceding collapse. All of the six patients were resuscitated: four had a severe subarachnoid hemorrhage (SAH), while the other two had a massive cerebellar hemorrhage. By contrast, 39 of the 74 patients who collapsed without any pain were resuscitated. Among them, another six patients were found to harbor an SAH. Thus, a total of 12 among the 124 witnessed OHCA (10%) sustained a fatal intracranial hemorrhage. While OHCA patients who collapse complaining of a sudden headache are uncommonly seen in the emergency room, they have a high likelihood of harboring a severe intracranial hemorrhage. It should also be reminded that approximately half of patients whose cardiac arrest is due to an intracranial hemorrhage may collapse without complaining of a headache. The prognosis of those with cerebral origin of OHCA is invariably poor, although they may relatively easily be resuscitated temporarily. Focus needs to be directed to avoid sudden death from a potentially treatable cerebral lesion, and public education to promote the awareness for the symptoms of potentially lethal hemorrhagic stroke is warranted.
authors: Department of Emergency Medicine, Saiseikai Utsunomiya Hospital, Utsunomiya, Tochigi, Japan. ginamasu@aol.com
authors: Joji
authors: J
authors: Inamasu
authors: Satoru
authors: S
authors: Miyatake
authors: Hideto
authors: H
authors: Tomioka
authors: Masashi
authors: M
authors: Nakatsukasa
authors: Akira
authors: A
authors: Imai
authors: Kenichi
authors: K
authors: Kase
authors: Kenji
authors: K
authors: Kobayashi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006261:Headache / Q000209:etiology*; D006323:Heart Arrest / Q000209:etiology*; D006801:Humans; D020300:Intracranial Hemorrhages / Q000150:complications*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies