Because of persistent and marked hypoxemia, a high PEEP (14 cmH2O) was tested. At the same time, the tidal volume was lowered to maintain the same plateau pressure (27 cmH2O). The TEE probe was left in place, frozen. Five minutes after these adjustments, the heart rate was 121 bpm, systolic blood pressure 115 mmHg, and systolic index of the RV 12 ml/m2. TEE now clearly shows ACP.
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