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Mean Arterial Pressure
- Arterial pressure is the input pressure for organ perfusion
- Mean arterial pressure (MAP) is the best physiologic estimate of perfusion pressure
- MAP is less subject to measurement variability than SBP and DBP
- MAP remains relatively constant when measured at different sites throughout the arterial circuit
- MAP of 60 mmHg is considered the autoregulatory threshold below which perfusion becomes compromised
- Goal: maintain MAP > 65 mmHg
- There is no proven value to achieving a MAP higher that 65 mmHg. In fact, there is some literature to support that if you try and drive the MAP higher, patients do worse