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Related Experiment Videos

An alternative to left ventricular volume reduction.

Xavier M Mueller1, Hendrik Tevaearai, Yves Boone

  • 1Department of Cardio-vascular Surgery, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland. Xavier.Mueller@chuv.hospvd.ch

The Journal of Heart and Lung Transplantation : the Official Publication of the International Society for Heart Transplantation
|July 9, 2002
PubMed
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Transventricular splints reshape the left ventricle (LV) to reduce wall stress in heart failure models. This novel technique improved hemodynamic parameters, showing potential for treating congestive heart failure patients.

Area of Science:

  • Cardiovascular Surgery
  • Biomedical Engineering
  • Heart Failure Research

Background:

  • Left ventricular (LV) remodeling leads to ventricular dilatation, increasing wall stress.
  • The law of Laplace explains this maladaptive process in heart failure.
  • Transventricular splints offer a novel approach to reduce LV radius and alter shape.

Purpose of the Study:

  • To evaluate the efficacy of transventricular splints in a bovine model of congestive heart failure.
  • To assess the impact of splint insertion on hemodynamic parameters.

Main Methods:

  • A bovine model (n=9) underwent sternotomy and transventricular splint insertion.
  • Crystalloid boluses were administered, and hemodynamic measurements were taken before and after splint tightening to achieve 10% and 20% stress reduction.

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  • Statistical analysis used the analysis of variance test (p < 0.05).

    • Main Results:

    • Splint tightening significantly reduced central venous pressure, mean pulmonary artery pressure, and pulmonary capillary wedge pressure.
    • Cardiac output improved significantly, while heart rate and mean arterial pressure remained unaffected.
    • Systemic and pulmonary resistances did not change significantly; no hemodynamic parameters worsened.

    Conclusions:

    • Transventricular splints improved hemodynamic parameters in a heart failure model, particularly at higher central venous pressure values.
    • The study supports the concept of reshaping the remodeled left ventricle using splints.
    • This technique demonstrates potential for improving outcomes in patients with congestive heart failure.