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• W2333554843 abstract "Cardiac displacement during off-pump coronary artery bypass (OPCAB) surgery causes a fall in cardiac output. Here, we investigate how this drop in systemic perfusion is transferred to the oxygenation of sublingual and cerebral tissue. Sublingual microcirculatory perfusion or microcirculatory hemoglobin oxygen saturation (μHbSO2) measurements were performed using sidestream dark-field imaging and reflectance spectrophotometry, respectively (both n=12). The cerebral tissue oxygenation index was measured by near-infrared spectrophotometry (n=12). Cardiac output was calculated by pulse contour analysis of arterial pressure. Cardiac displacement reduced the cardiac output from 4.3±0.8 to 1.2±0.3 l/min (P<0.05), paralleled by a decrease in μHbSO2 from 64.2±9.1 to 48.6±8.7% (P<0.01). Cardiac displacement did not change functional capillary density, while red blood cell velocity decreased from 895±209 to 396±178 μm/s (P<0.01). Cerebral tissue oxygenation index decreased from 69.5±4.0 to 57.4±8.5% (P<0.01) during cardiac displacement. After repositioning of the heart, all the values returned to baseline. Our data suggest that systemic hemodynamic alterations during cardiac displacement in OPCAB surgery reduce sublingual and cerebral tissue oxygenation. These findings are particularly important for patients at risk for the consequences of cerebral ischemia." @default.
• W2333554843 created "2016-06-24" @default.
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• W2333554843 date "2011-10-06" @default.
• W2333554843 modified "2023-10-01" @default.
• W2333554843 title "Cardiac displacement during off-pump coronary artery bypass grafting surgery: effect on sublingual microcirculation and cerebral oxygenation" @default.
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• W2333554843 doi "https://doi.org/10.1510/icvts.2011.272047" @default.
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