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Noninvasive Evaluation of Intraventricular Flow Dynamics by the HyperDoppler Technique: First Application to Normal

Andrea Fiorencis1, Marco Pepe2, Vittorio Smarrazzo3

  • 1Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova, 35128 Padova, Italy.

Journal of Clinical Medicine
|April 23, 2022
PubMed

Insights

HyperDoppler echocardiography reliably assesses left ventricular (LV) flow dynamics. This new technique accurately differentiates vortex flow patterns in healthy individuals, athletes, and heart failure patients.

Area of Science:

  • Cardiology
  • Medical Imaging
  • Fluid Dynamics

Background:

  • Intracardiac flow dynamics assessment is crucial for diagnosing cardiovascular conditions.
  • Existing echocardiographic techniques have limitations in quantifying complex flow patterns.
  • HyperDoppler offers a novel color Doppler-based approach to analyze intracardiac flow.

Purpose of the Study:

  • To evaluate the feasibility and reproducibility of the HyperDoppler technique in a diverse patient population.
  • To assess the capability of HyperDoppler in differentiating left ventricular (LV) vortex flow characteristics across different physiological and pathological states.
  • To establish the reliability of vortex flow measurements including area, intensity, depth, length, and kinetic energy dissipation (KED).

Main Methods:

  • Two hundred unselected patients, including normal subjects (50), athletes (30), and heart failure patients (50) with LV ejection fraction <50%, were enrolled.
  • Echocardiographic images were acquired using a MyLab X8 echo-scanner.
  • HyperDoppler technique was employed to measure vortex flow parameters: area, intensity, depth, length, and kinetic energy dissipation (KED).

Main Results:

  • The HyperDoppler technique demonstrated high feasibility (94.5%).
  • Repeatability and reproducibility were good to excellent for all measured vortex flow parameters (ICC values ranging from 0.82 to 0.98).
  • Combined vortex flow measures successfully differentiated LV flow profiles among healthy sedentary individuals, athletes, and heart failure patients.

Conclusions:

  • HyperDoppler is a feasible, reliable, and practical method for assessing LV flow dynamics.
  • The technique shows significant potential in distinguishing between normal subjects, athletes, and patients with heart failure based on intracardiac flow patterns.
  • HyperDoppler provides valuable insights into vortex flow dynamics, aiding in cardiovascular assessment.

Keywords:
HyperDopplerathletesintracardiac flow dynamicskinetic energy dissipationvortex flow

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