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. 2016 Feb 23;4(4):e12716. doi: 10.14814/phy2.12716

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© 2016 The Authors. Physiological Reports published by Wiley Periodicals, Inc. on behalf of the American Physiological Society and The Physiological Society.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Respiratory signal, Resp_HR, and pulse pressure in the time and frequency domain for an example patient ventilated with SIMV (RR = 1 Hz, HR = 2.1 Hz). (A) Respiratory signal with time points that systolic pressure is reached (squares). (B) Resp_HR. (C) Pulse pressure. (D) Frequency spectrum of the respiratory signal. (E) Frequency spectra of Resp_HR (solid) and pulse pressure (dashed). RR, respiratory rate; HR, heart rate; Resp_HR, the respiratory values at the moment systolic pressure was reached.