A computer-controlled aortic and mitral valve occluder

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S B Solomon1, S D Nikolic, R W Frater

  • 1Department of Cardiothoracic Surgery, Albert Einstein College of Medicine, Bronx, NY, USA.

Annals of Biomedical Engineering
|January 1, 1997
PubMed

Insights

Researchers developed computer-controlled occluders to precisely measure cardiac mechanics. These tools separate active and passive ventricular filling components, improving understanding of beat-to-beat heart function.

Area of Science:

  • Cardiovascular Physiology
  • Biomedical Engineering

Background:

  • Cardiac mechanics analysis requires understanding beat-to-beat changes.
  • Left ventricular diastolic filling has simultaneous active (relaxation) and passive components.

Purpose of the Study:

  • To develop novel computer-controlled devices to separate active and passive components of left ventricular filling.
  • To simultaneously alter afterload conditions and control ventricular filling/ejection.

Main Methods:

  • Designed a computer-controlled mitral valve occluder to prevent left ventricular filling.
  • Designed a computer-controlled aortic occluder to modify afterload.
  • Utilized these devices in experiments with six dogs for precise beat-to-beat control.

Main Results:

  • The devices effectively controlled ventricular inflow and ejection on a beat-to-beat basis.
  • Achieved more accurate triggering and occlusion timing compared to previous methods.
  • Successfully separated passive filling from active ventricular relaxation and altered afterload simultaneously.

Conclusions:

  • The developed computer-controlled occluders provide a precise method for studying cardiac mechanics.
  • This technology facilitates a deeper understanding of the control mechanisms governing ventricular filling and ejection.
  • Enables advanced research into cardiac function and potential therapeutic interventions.

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