hypocapnia/headache

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Cluster headache: transcranial Doppler assessment of dynamic cerebral circulatory changes during hypocapnia and attack.

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Transcranial Doppler ultrasound (TCD) investigations have been carried out in cluster headache patients (8 during remission and 6 during bout) and 14 healthy subjects, to assess cerebral vasomotor reactivity (VMR) to hypocapnia induced by voluntary hyperventilation. VMR was expressed as the relative

The effect of sodium nitroprusside on cerebral hemodynamics and headache in healthy subjects.

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METHODS Sodium nitroprusside (SNP) is a powerful vasodilatory agent that, similarly to glyceryl trinitrate (GTN), releases nitric oxide (NO) but in contrast does not pass the blood-brain barrier. Nevertheless, it has already been used in animal models without any knowledge of its headache-inducing

Cerebrovascular reactivity in migraine during headache-free intervals.

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Alterations of intracranial vessel tone have been implicated in the pathophysiology of migraine. The cerebrovascular reactivity was measured by means of transcranial Doppler in 60 migraine patients with (n = 30) or without aura (n = 30) during the headache-free interval and in 30 healthy controls.

Transcranial Doppler evaluation in migraineurs.

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Transcranial Doppler (TCD) enables indirect assessment of cerebral circulation by measurement of cerebral blood flow velocity. Stenosis and occlusion of cerebral vessels or cerebral vasospasm can be detected with this non-invasive method. Moreover, changes in cerebral blood flow velocity in response

Intracranial blood flow velocities and CO2 reactivity in diagnosing migraine-related dizziness.

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OBJECTIVE Migraine-related dizziness can present with or without headache, often making diagnosis difficult. Flow velocity and CO 2 reactivity testing using transcranial Doppler (TCD) measurement of intracranial blood flow has been described as abnormal in patients with classic or common migraine.

Cerebral vasomotor reactivity in migraine: effect of patent foramen ovale and aerogenic microembolism

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Objective: The first data on the effect of presence of patent foramen ovale (PFO) with high-volume right-to-left shunt (RLS) on cerebral vasomotor reactivity (CVMR) in migraineurs are herein presented. In addition, the immediate effect of

[Cerebral hemodynamics in the syndrome of pseudomigraine with csf-pleocytosis:a transcranial doppler study].

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BACKGROUND The clinical picture of the pseudomigraine with CSF pleocytosis syndrome is of intermittent headaches, sometimes accompanied by episodes of transient neurological defects and lymphocyte pleocytosis, which occur for a variable length of time, followed by spontaneous resolution. It has been

Cerebrovascular reactivity in migraineurs as measured by transcranial Doppler.

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Transcranial Doppler ultrasound is a relatively new diagnostic modality which allows the noninvasive assessment of intracranial circulation. A total of 10 migraine patients were studied and compared to healthy controls without headaches. Migraineurs during the headache-free interval demonstrated

The typical presentation of an atypical pathogen during an outbreak of Legionnaires' disease in Vila Franca de Xira, Portugal, 2014.

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BACKGROUND An outbreak of Legionella pneumophila serogroup 1, with 403 cases was identified on the 7th November 2014 in Vila Franca de Xira, Portugal. Outbreak source was the wet cooling system of a local factory. Hospital Pulido Valente was one of the hospitals receiving patients with Legionnaires'

Cerebrovascular CO2 reactivity in migraine with aura and without aura. A transcranial Doppler study.

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BACKGROUND We studied by means of Transcranial Doppler (TCD) recordings the CO2 cerebrovascular reactivity in migraine patients during the headache-free period. METHODS In three groups of subjects (15 controls, 15 suffering from migraine with aura and 15 from migraine without aura) the middle

Eighteen cases exposed to sarin in Matsumoto, Japan.

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Forty-six patients who were exposed to sarin consulted our hospital because of darkness of vision, and ocular pain, vomiting, dyspnea and headaches on June 27 and 28, 1994. Eighteen patients were admitted and 4 of them were in the critical state. There were 6 features: 1) depression of plasma

[Epidemic of hantavirus disease in Entre-Sambre-et-Meuse: year 1992-1993. Clinical and biological aspects].

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A multihospital study allowed us to follow a total of 62 serologically proven cases of Nephropathia epidemica (NE) in the Belgian region between Sambre and Meuse during the 1992-1993 period. The clinical picture consisted of sudden high fever (100% of the cases), headache (71%), abdominal or lumbar

High altitudes, anxiety, and panic attacks: is there a relationship?

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People exposed to high altitudes often experience somatic symptoms triggered by hypoxia, such as breathlessness, palpitations, dizziness, headache, and insomnia. Most of the symptoms are identical to those reported in panic attacks or severe anxiety. Potential causal links between adaptation to

Increased cerebrovascular pCO2 reactivity in migraine with aura--a transcranial Doppler study during hyperventilation.

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Cerebrovascular reactivity during hypocapnia was tested in 20 migraineurs (8 with aura, 12 without aura) and 30 sex- and age-matched healthy subjects, and during nitroglycerin-induced headache in 12 healthy subjects. Before and during hyperventilation, mean blood-flow velocity (Vmean) in the middle

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