Tuesday, April 12, 2011
Patients with Headache
Headaches are a very common medical complaint. In assessing patients with headaches, we must determine who has a serious cause of a headache and who requires neuroimaging. A Rational Clinical Exam article from JAMA entitled "Does this patient with headache have a migraine or need neuroimaging?" helps to outline an approach to headache. After a systemic review of the literature, the best predictors of a migraine were summarized by the mnemonic POUNDing: Pulsation, duration of 4-72 hOurs, Unilateral, Nausea, Disabling). If a patient meets 4 out of the 5 criteria, the likelihood ratio (LR) for definite or possible migraines is 24. For neuroimaging, several clinical features were found on pooled analysis to predict the presence of a serious intracranial abnormality: cluster-type headache (LR 10.7), abnormal findings on neurological examination (LR 5.3), undefined headache (LR 3.8), headache with aura (LR 3.2), headache aggrevated by exertion or valsalva (LR 2.3), and headache with vomiting (LR 1.*). It should be noted that no clinical features were useful in ruling out significant pathologic conditions. To see the full Rational Clinical Exam article click here http://jama.ama-assn.org/content/296/10/1274.full.pdf+html?sid=80cae855-c34e-401a-a365-34f964dfe247
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