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Plasma angiotensin II (ANG II) levels were measured before the beginning of mechanical ventilation (MV; 0 h) and following 12 h of MV. The reported plasma ANG II levels are the differences between these two time points. SB, spontaneous breathing; MVL, mechanical ventilation treated with losartan; MVE, mechanical ventilation treated with enalapril. Values are means ± SE. P < 0.05, significantly different vs. MV (*) and MVE (‡).
