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A right ventricular pressure waveform based pulse contour cardiac output algorithm in canines

Mustafa Karamanoglu1, Tom D Bennett

  • 1Heart Failure Management, Medtronic Inc, 7000 Central Ave NE, CW320, Fridley, MN 55432, USA. mustafa.karamanoglu@Medtronic.com

Cardiovascular Engineering (Dordrecht, Netherlands)
|September 9, 2006
PubMed

Insights

A new algorithm using right ventricular pressure estimates cardiac output (CO) accurately, even during critical hemodynamic changes. This method offers a reliable way to track CO in various heart conditions.

Area of Science:

  • Cardiovascular Physiology
  • Biomedical Engineering
  • Hemodynamic Monitoring

Background:

  • Accurate tracking of cardiac output (CO) is vital for managing cardiac diseases.
  • Existing arterial pressure-based CO algorithms struggle with altered systemic hemodynamics.

Purpose of the Study:

  • To develop and validate a novel right ventricular pressure waveform-based pulse contour CO algorithm.
  • To assess the algorithm's performance during diverse hemodynamic perturbations.

Main Methods:

  • Developed a CO algorithm estimating pulmonary artery flow waveform parameters from right ventricular pressure.
  • Validated the algorithm against gold standard measurements in canines undergoing induced changes in preload, afterload, and contractility.

Main Results:

  • The algorithm accurately predicted CO changes (r2 = 0.82) across a wide range (-45% to +31%).
  • Pulmonary artery impedance parameters remained stable, unlike significantly altered ascending aortic parameters during perturbations.
  • Right ventricular pressure-based CO estimation proved robust despite left ventricular hemodynamic shifts.

Conclusions:

  • Right ventricular pressure waveform analysis provides a feasible method for CO estimation.
  • This approach maintains accuracy during acute alterations in systemic and cardiac hemodynamics.
  • Offers a potential advancement in hemodynamic monitoring for critical care and cardiac diagnostics.

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