The Medical clinics of North America
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Pain around the eye can be caused by local ophthalmic disorders or by disease of other structures sharing trigeminal nerve sensory innervation. In general, most ocular causes for pain also cause the eye to be red, thus alerting the examiner to the focality of the problem. However, conditions like eyestrain, intermittent angleclosure glaucoma or neovascular glaucoma, and low-grade intraocular inflammation can be painful and not be associated with obvious redness. ⋯ Headache and transient visual loss can be manifestations of classic migraine, or be symptoms of ocular hypoperfusion from ipsilateral internal carotid occlusion or increased intracranial pressure from pseudotumor cerebri. In a young patient, head pain with a fixed visual deficit may result from optic neuritis, in an older adult, temporal arteritis may be the culprit. Ophthalmologic aspects of headache thus encompass problems that range from simple and benign to complex and formidable.
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Although headache is the most common sequelae of head injury, the posttraumatic headache is associated frequently with dizziness, irritability, lack of concentration, and intolerance to alcohol ingestion as a part of a symptom complex known as the postconcussion syndrome. This article clarifies the definitions of acute traumatic headache, posttraumatic headache, and the postconcussion syndrome and improves diagnostic ability, making the assessment and treatment of patients with these three conditions more accurate and effective.
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Subarachnoid hemorrhage causes sudden, severe headache and requires immediate medical and surgical diagnosis and treatment. A CT scan is the first choice for correct diagnosis. In order to prevent rebleeding, delays in treatment should be avoided. ⋯ Ischemic cerebrovascular disease is frequently accompanied by headache, but its etiology remains uncertain. Thrombosis of the cerebrovenous system is a less frequent cause of head pain than that of the arterial system, but it usually shows characteristic neurologic signs. Following carotid endarterectomy or superficial temporal artery-middle cerebral artery bypass surgery, the patient may have moderate to severe unilateral headaches, probably as a result of platelet aggregation and serotonin release.
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The treatment of headache disorders in patients with concomitant medical illness constitutes one of the more challenging areas of headache therapy. As new agents are added to our pharmacologic armamentarium, it will become easier to tailor therapy to our patients. The physician who treats the headache patient with concomitant medical illness must be particularly aware of drug side effects and pharmacology in order to prevent a worsening of underlying medical conditions or an exacerbation of headaches.
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Migraine equivalents and complicated migraine are entities in which definition is difficult, presentations are pleomorphic, diagnosis is treacherous, pathophysiology is obscure, and treatment is uncertain. A useful principle is to regard them as diagnoses of exclusion that require aggressive and comprehensive investigation. Rational treatment consists of migraine prophylaxis using agents with minimal vasospastic potential and, in some cases, acetylsalicylic acid for platelet disaggregation. The prognosis for both complicated migraine and migraine equivalents is good; when patients with these diagnoses come to harm, it is often because the diagnosis is incorrect.