نتایج جستجو برای: breath holding
تعداد نتایج: 43883 فیلتر نتایج به سال:
CONTEXT Standards for treating patients with asymptomatic carotid artery stenosis have been difficult to establish because of the lack of evidence for factors influencing these patients' prognoses. However, preliminary evidence suggests that an alteration in cerebral hemodynamic function may play a relevant role in the occurrence of stroke in patients with carotid artery disease. OBJECTIVE To...
BACKGROUND It is known that respiration modulates cavopulmonary flows, but little data compare mean flows under breath-holding and free-breathing conditions to isolate the respiratory effects and effects of exercise on the respiratory modulation. METHODS Real-time phase-contrast magnetic resonance combined with a novel method to track respiration on the same image acquisition was used to inve...
BACKGROUND AND PURPOSE This study aimed to monitor cognitive performance during a 3-year period in subjects with bilateral asymptomatic severe internal carotid artery stenosis and to explore the role of cerebral hemodynamics and atherosclerotic disease in the development of cognitive dysfunction. METHODS One hundred fifty-nine subjects with bilateral asymptomatic severe internal carotid arter...
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