Richard Purdy

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The purpose of the study was to compare the impact of continuing medical education for primary care physicians in Halifax, Nova Scotia, Canada, delivered through a problem-based learning (PBL) format with that of a lecture-based format, in the clinical area of headache diagnosis and management. From January to June 1995, 38 physicians participated in three(More)
Perfluorinated chemicals (PFCs) form a special category of organofluorine compounds with particularly useful and unique properties. Their large use over the past decades increased the interest in the study of their environmental fate. Fluorocarbons may have direct or indirect environmental impact through the products of their decomposition in the(More)
BACKGROUND Health care providers frequently cite concerns about cardiovascular safety of the triptans as a barrier to their use. In 2002, the American Headache Society convened the Triptan Cardiovascular Safety Expert Panel to evaluate the evidence on triptan-associated cardiovascular risk and to formulate consensus recommendations for making informed(More)
OBJECTIVE To provide physicians and allied health care professionals with guidelines for the diagnosis and management of migraine in clinical practice. OPTIONS The full range and quality of diagnostic and therapeutic methods available for the management of migraine. OUTCOMES Improvement in the diagnosis and treatment of migraine, which will lead to a(More)
BACKGROUND Migraine aura, made up of one or more neurological symptoms arising from the cortex or brainstem, is a complex neurological phenomenon. Visual aura is the most frequent aura manifestation. Studying the subjective components of visual aura makes it possible to identify common characteristics. OBJECTIVE To thoroughly describe the characteristics(More)
Approximately 57 patients with red ear syndrome have been reported in the literature since it was initially described in 1994. The clinical phenotype therefore continues to be defined and no consistent treatment response has been described. We report three new cases of red ear syndrome and suggest that the disorder may exist as a primary trigeminal or(More)
Migraine is a pathophysiologically complex disorder that arises from a neurovascular disturbance in the brain itself, and involves modulatory mechanisms in the brainstem, subcortical and cortical levels to process pain. These processing mechanisms may be abnormal in migraine, which uses otherwise normal neural pathways for pain transmission. Migraine is(More)
This article overviews headache and brain tumors, particularly from the diagnostic point of view of patients presenting with headache as their major symptom. Common and uncommon brain tumors can produce headache and investigation is warranted if any red flags are present. An overview of particular tumors and their presentations are covered along with some(More)