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Assessing Single Ventricle Function in the Fontan Circulation using Wave Intensity Analysis.

John Valdovinos1, Nicolas Eng2, Matthew Russell3

  • 1Electrical and Computer Engineering Department, California State University Northridge, 18111 Nordhoff St., Northridge, CA, 91330, USA. john.valdovinos@csun.edu.

Pediatric Cardiology
|January 30, 2021
PubMed
Summary
This summary is machine-generated.

Wave intensity analysis shows distinct hemodynamic differences in Fontan circulation patients, potentially aiding in early detection of heart failure and predicting outcomes in single ventricle heart disease.

Keywords:
FontanPulse wave analysisSingle ventricleWave intensity

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Area of Science:

  • Cardiovascular Physiology
  • Hemodynamics
  • Pediatric Cardiology

Background:

  • Single ventricle hearts repaired with the Fontan operation often develop long-term complications due to elevated venous pressures and impaired ventricular function.
  • Assessing the hemodynamics in these patients is crucial for predicting clinical outcomes and managing potential heart failure.

Purpose of the Study:

  • To evaluate the clinical utility of wave intensity analysis (WIA) in assessing the functional performance of single ventricle hearts in Fontan patients.
  • To compare hemodynamic parameters derived from WIA between Fontan patients and controls with biventricular circulation.

Main Methods:

  • A retrospective analysis of invasive hemodynamic data from cardiac catheterizations was performed.
  • WIA was applied to aortic pressure waveforms and Doppler measurements in 20 Fontan patients and 10 controls.
  • Key parameters including peak forward compression wave, early systolic energy flux, and systolic/diastolic ratio were calculated.

Main Results:

  • Significant differences were observed in peak forward compression wave, early systolic energy flux, and systolic/diastolic ratio between Fontan patients and controls.
  • A positive correlation was found between wave speed and pulmonary vascular resistance within the Fontan group.
  • Early systolic energy flux showed potential as an indicator for heart failure classification in Fontan patients (AUC=0.71).

Conclusions:

  • Wave intensity analysis is a promising tool for evaluating hemodynamics in Fontan patients.
  • WIA may aid in screening, predicting clinical outcomes, and identifying Fontan failure.
  • Further prospective studies are warranted to confirm these findings.