@article{3125138,
    title = "Reversible cerebral vasoconstriction syndrome as a cause of thunderclap headache: A retrospective case series study",
    author = "Papathanasiou, A. and Zouvelou, V. and Breen, D.P. and Phillips, T.J. and Misbahuddin, A. and Chawda, S. and De Silva, R.",
    journal = "The American Journal of Emergency Medicine",
    year = "2015",
    volume = "33",
    number = "6",
    pages = "859.e3-859.e6",
    publisher = "W.B. Saunders",
    issn = "0735-6757",
    doi = "10.1016/j.ajem.2014.12.026",
    keywords = "adult;  Article;  brain angiography;  case report;  digital subtraction angiography;  female;  human;  male;  middle aged;  nausea;  neurologic examination;  nuclear magnetic resonance imaging;  priority journal;  reversible cerebral vasoconstriction syndrome;  slurred speech;  subarachnoid hemorrhage;  thunderclap headache;  vomiting;  young adult;  complication;  diagnostic imaging;  differential diagnosis;  Headache Disorders, Primary;  remission;  retrospective study;  risk factor;  subarachnoid hemorrhage;  Vasospasm, Intracranial, Adult;  Diagnosis, Differential;  Diagnostic Imaging;  Female;  Headache Disorders, Primary;  Humans;  Middle Aged;  Remission, Spontaneous;  Retrospective Studies;  Risk Factors;  Subarachnoid Hemorrhage;  Vasospasm, Intracranial",
    abstract = "Thunderclap headache is a common emergency department presentation. Although subarachnoid hemorrhage (SAH) should be the first diagnosis to exclude, reversible cerebral vasoconstriction syndrome (RCVS) is an important alternative cause, which may be commoner than appreciated. Reversible cerebral vasoconstriction syndrome is characterized bymultifocal narrowing of cerebral arteries, typically manifested by acute, severe headache with or without neurologic deficits. © 2014 Elsevier Inc. All rights reserved."
}