نتایج جستجو برای: hypocapnia
تعداد نتایج: 666 فیلتر نتایج به سال:
Panic patients consistently show exaggerated lactic acid response to alkalosis, whether produced by hyperventilation or by sodium lactate infusion. Understanding why this occurs may provide important clues to the pathogenesis of panic disorder. Although brain hypoxia from excessive hypocapnia-induced cerebral vasoconstriction is often cited as the mechanism of elevated brain lactic acid in pani...
A method for measuring regional myocardial blood flow with a polarographic hydrogen-clearance technique, and its experimental application in dogs, are described. Under pentobarbitone anaesthesia, flow to the superficial (3 mm) and deep (8 mm) layers of the left ventricle was not significantly different. Neither hypocapnia (PaCO2 = 24 mm Hg) nor halothane significantly altered differential distr...
This investigation tests the hypothesis that the normal cerebral image obtained non-invasively during continuous inhalation of C"O, is related to cerebral blood flow. Trace amounts of CO, labeled with the positron-emitting radionuclide " 0 were administered to 4 normal subjects at normoand hypocapnia and to 2 of these subjects at hypercapnia. Hypocapnia typically caused a marked decrease in cer...
1. Both hypoxia and hypocapnia can cause broncho-constriction in humans, and this could have a bearing on performance at high altitude or contribute to altitude sickness. We studied the relationship between spirometry, arterial oxygen saturation and end-tidal carbon dioxide (ETCO2) concentration in a group of healthy lowland adults during a stay at high altitude, and then evaluated the response...
Four patients with diabetes mellitus and no underlying clinical pulmonary disease were found to have extensive unilateral mucous occlusion of a major central bronchus. None of the patients had significant auscultatory findings suggestive of pulmonary secretions, and chest roentgenographic films were normal. Arterial blood gas evaluation failed to reveal the usual hypocapnia during ketoacidosis,...
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