Extracorporeal circulation during on-pump cardiac surgery: An evaluation of the energy equivalent pressure index based on waveforms decomposition in harmonics.

Publisher: Wiley-Blackwell Country of Publication: United States NLM ID: 7802778 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1525-1594 (Electronic) Linking ISSN: 0160564X NLM ISO Abbreviation: Artif Organs Subsets: MEDLINE

Publication: Cambridge, MA : Wiley-Blackwell
Original Publication: Cleveland, International Society for Artificial Organs.

Cardiac Surgical Procedures*; Arterial Pressure/*physiology ; Extracorporeal Circulation/*methods ; Pulsatile Flow/*physiology; Hemodynamics ; Humans

The use of pulsatile perfusion instead of nonpulsatile perfusion during cardiopulmonary bypass continues to be a source of debate. The disagreements among the conclusions of the published studies may be due to different factors: differences in the type of patients included in the studies, differences in the protocol of the studies, and difficulty to quantify the pulsatility of the flow. In the present paper, we propose a quantitative evaluation of Shepard's energy equivalent pressure index, based on the harmonic decomposition of the physiological aortic pressure and flow rate signal. It is thus demonstrated that the surplus energy provided by pulsatile flow remains moderate (of order 10 mm Hg), but that it can be improved by changing the relative shapes of the pressure and flow waves.
(© 2021 International Center for Artificial Organs and Transplantation and Wiley Periodicals LLC.)

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Keywords: cardiac surgery; energy equivalent pressure; extracorporeal circulation; pulsatile flow

Date Created: 20210202 Date Completed: 20211214 Latest Revision: 20211214

20250114

10.1111/aor.13928

33529368