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Related Concept Videos

Heart Valves01:16

Heart Valves

The human heart is a complex organ with an intricate system of valves that regulate blood flow. There are two main types of valves: atrioventricular (AV) valves and semilunar valves.
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
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Related Experiment Video

Updated: Jun 16, 2026

Upper-extremity Approach for Secondary Access in Transfemoral Transcatheter Aortic Valve Implantation
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Aortic and venous valve for percutaneous insertion.

D Pavcnik1, B T Uchida, H Timmermans

  • 1Dotter Interventional Institute, Oregon Health Sciences University, Portland, OR 97201, USA.

Minimally Invasive Therapy & Allied Technologies : MITAT : Official Journal of the Society for Minimally Invasive Therapy
|February 17, 2010
PubMed
Summary
This summary is machine-generated.

This study evaluated a new artificial bicuspid valve made from porcine submucosa. The novel valve demonstrated promising function and stability in both aortic and venous applications in animal models.

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Area of Science:

  • Biomaterials Science
  • Cardiovascular Surgery
  • Medical Devices

Background:

  • Artificial heart valves are crucial for treating valvular heart disease.
  • Current prosthetic valves have limitations, necessitating innovation.
  • Developing biocompatible and durable artificial valves remains a key challenge.

Purpose of the Study:

  • To evaluate the in vitro and in vivo performance of a novel artificial bicuspid aortic and venous valve.
  • To assess the functional and hemodynamic characteristics of the new valve design.
  • To determine the biocompatibility and stability of the valve in animal models.

Main Methods:

  • Valves constructed from barbed stents covered with porcine small intestine submucosa (SIS).
  • In vitro testing in a flow model with pressure measurements and simulated ejection fraction.
  • In vivo implantation in swine and dogs for aortic and venous applications, followed by pressure measurements, aortograms, venograms, and histological analysis.

Main Results:

  • In vitro testing showed functional valve performance under simulated physiological conditions.
  • In vivo acute and short-term studies demonstrated valve stability and acceptable hemodynamics in aortic positions.
  • Venous valve implantation in dogs and swine indicated feasibility for IVC and iliac vein applications.

Conclusions:

  • The novel artificial bicuspid valve shows potential for both aortic and venous applications.
  • The SIS-covered stent design offers a promising platform for future cardiovascular valve development.
  • Further long-term studies are warranted to fully elucidate the clinical applicability of this innovative valve.