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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: J Thorac Cardiovasc Surg. 2017 Jul 24;154(5):1590–1598.e2. doi: 10.1016/j.jtcvs.2017.04.091

Figure 2.

Figure 2

Representative graph of cerebral autoregulation monitoring by mean velocity index (Mx) during cardiopulmonary bypass. The top graph represents the time-series of arterial blood pressure (ABP) while the bottom bar-graph the percentage of the time of the recording spent at 5 mmHg bin. Optimal mean arterial pressure (MAP, ABP) for the left and right side of the brain was defined as that MAP with the lowest Mx. Lower limit of cerebral autoregulation (LLA) and upper limit of cerebral autoregulation (ULA) were defined as the MAP at which Mx reached 0.4. In this example, the optimal MAP is 85 mmHg (black arrow) and the LLA and ULA are 70 mmHg and 95 mmHg, respectively (black-outlined arrow).