Presse Med
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The varicella-zoster virus is an exclusively human herpesvirus, responsible for chickenpox. Its reactivation, after several decades, causes herpes zoster (shingles). Herpes zoster produces a rash, classically metameric, that causes acute pain and complications to elderly patients. ⋯ This neuralgia is defined as a painful syndrome lasting for more than 30 days after eruption of the rash. Today's systemic antiviral drugs can reduce the severity of the eruption, limit the pain, and diminish the incidence of postherpetic neuralgia. A recent advance in primary prevention is approval of a vaccine (Zostavax) to prevent herpes zoster and postherpetic neuralgia in subjects 60 years or older.
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Pregnancy-related hypertension is defined by systolic blood pressure > or = 140 mmHg and/or diastolic blood pressure > or = 90 mmHg at any term. It is more appropriate to talk about "hypertensive pregnancy syndromes", for the clinical aspects can be very heterogeneous. This disease is still common and affects approximately 10 to 15% of pregnancies. ⋯ Short-term risks are associated especially with the complicated forms of hypertension. In the long term, preeclampsia is a marker of cardiovascular risk, for these women are at risk of developing chronic hypertension or having a cardiovascular accident in later years. Pregnancy is currently considered a situation that can reveal the likelihood of developing the metabolic syndrome and its cardiovascular complications.
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Hyperglycemia is commun in critically ill patients without previously known diabetes. Hyperglycemia occurring in these patients is mainly a consequence of stress associated to complex glucose metabolism abnormalities which have deleterious effects on tissues and vascular function. ⋯ However the benefit of most of these intervention trials remain controversial mainly in stroke, myocardial infarction and severe sepsis. Moreover strict normoglycemia required to obtain an optimal benefit increases the risk of hypoglycaemia which may be particularly harmful in patients in critical state.
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Obstructive sleep apnea syndrome (OSAS), due to upper airway collapse, is frequent but still underestimated. The dose-response relation between OSAS and hypertension (HTN) is now well established. Logically, therefore, blood pressure must be tested in every apneic patient, if necessary by ambulatory blood pressure monitoring. ⋯ OSAS promotes the formation of arterial lesions (parietal thickening of the carotid artery, increased aortic stiffness, and endothelial dysfunction); the more severe the OSAS, the more severe the lesions. The beneficial effects on blood pressure of continuous positive airway pressure (CPAP), the benchmark treatment for OSAS, are still debated but appear to be significant for untreated or refractory hypertension, for severe OSAS, and when CPAP compliance is good. It also seems promising for the reduction of arterial lesions linked to OSAS.