EVIDENCE FOR PULMONARY VASOCONSTRICTION IN MAN
نویسندگان
چکیده
منابع مشابه
Evidence for pulmonary vasoconstriction in man.
The occurrence of pulmonary vasomotor activity has been one of the most highly disputed subjects in modern medicine. Probably the most decisive studies of pulmonary vasomotion were those of Daly and his collaborators (1952). Over the course of the last fifteen years by elaborately devised experiments under rigidly controlled conditions, they demonstrated in animals the occurrence of both vasoco...
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A reduction of arterial PO2 is generally observed when vasodilators are given to patients with cardiac or pulmonary disease. This has been attributed to a release of preexisting hypoxic pulmonary vasoconstriction (HPV). We investigated the effects of hemodynamics and blood gases of IV nitroglycerin, IV nitroprusside and sublingual nifedipine, at dosages currently used in clinical practice, in 2...
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I AHPR = acute hypoxic pressor response T he pulmonary circulation responds to acute hypoxia with increases in pulmonary artery pressure and vascular resistance. This acute hypoxic pressor response (AHPR) is a unique physiologic feature distinguishing the pulmonary from the systemic circulation which dilates in response to hypoxia.’ Since Von Euler and Liljestrand described the phenomenon of ac...
متن کاملSimultaneous pulmonary trunk and pulmonary arterial wave intensity analysis in fetal lambs: evidence for cyclical, midsystolic pulmonary vasoconstriction.
The physiological basis of a characteristically low blood flow to the fetal lungs is incompletely understood. To determine the potential role of pulmonary vascular interaction in this phenomenon, simultaneous wave intensity analysis (WIA) was performed in the pulmonary trunk (PT) and left pulmonary artery (LPA) of 10 anesthetized late-gestation fetal sheep instrumented with PT and LPA micromano...
متن کاملHypoxic Pulmonary Vasoconstriction in Humans
Hypoxic pulmonary vasoconstriction is the elegant theory put forward more than six decades ago to explain regional variations in perfusion within the lung in certain animal species in response to localised restrictions in oxygenation. Although considerable progress has been made to describe the phenomenon at the macroscopic level and explain it at the microscopic level, we are far from a univer...
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ژورنال
عنوان ژورنال: Heart
سال: 1958
ISSN: 1355-6037
DOI: 10.1136/hrt.20.3.346