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Cardiopulmonary hemodynamic responses in anesthetized rats in 6 ATA O2. A: right ventricular systolic pressure (RVSP). B: left ventricular end-diastolic pressure (LVEDP). C: calculated pulmonary blood volume (PBV). D: calculated pulmonary vascular resistance (PVR). RVSP and LVEDP are expressed as absolute values; PBV and PVR are shown as percentages of preexposure levels (in air at 1 ATA). Compression to 6 ATA was achieved at time 0. Values are means ± SE. *P < 0.05 vs. air.
