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- W2009530590 abstract "To determine the effects of chronic hypoxemia neonatally on the cardiovascular response to acute hypoxemia in adulthood.Experiments were conducted on adult rats (82+/-2 days) which had been made chronically hypoxemic (hypobaric hypoxia equivalent to FiO(2)=0.14) during the first ten days of life but raised in room air (Neonatally Hypoxemia) as well as on adult rats never previously hypoxemic (Control). The animals were instrumented with catheters in the right common carotid artery and superior vena cava for measurements of mean systemic arterial pressure (MAP), central venous pressure, heart rate (HR), arterial blood gases, and arterial as well as mixed venous O(2) saturation. Oxygen consumption (VO(2)) was measured allowing calculation of cardiac index (CI), stroke volume index (SVI) and systemic vascular resistance index (SVRI). The rats were made acutely hypoxemic by exposure to FiO(2)=0.10 for 20 min.HR increased and MAP decreased to similar extents in both groups during acute hypoxemia. However, SVI and CI increased significantly (P<0.05) during acute hypoxemia in the Neonatally Hypoxemic group (24+/-6%, 41+/-8%) but respectively decreased and did not change in the Control animals (-13+/-6%, 2+/-6%). SVRI fell significantly more during hypoxemia in the Neonatally Hypoxemic animals than in the Control group (36+/-4% vs. 14+/-5%).Hypoxemia experienced in early life has long-term effects on the cardiovascular response to acute hypoxemia at maturity. This may have important implications for individuals hypoxemic in early life due to congenital cyanotic heart defects or pulmonary disease secondary to prematurity." @default.
- W2009530590 created "2016-06-24" @default.
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- W2009530590 date "2002-01-01" @default.
- W2009530590 modified "2023-09-27" @default.
- W2009530590 title "Cardiovascular response to acute hypoxemia in adult rats hypoxemic neonatally" @default.
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- W2009530590 doi "https://doi.org/10.1016/s0008-6363(01)00475-8" @default.
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