Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Hemodynamic performance of different stent strategies for coronary bifurcations. Evaluation with a
Year:2011
Research Areas
  • Mechanical engineering
Information
Abstract
Purpose: Best percutaneous treatment strategy for lesions in coronary bifurcations is an ongoing subject of debate. There is limited data that analyses the effect of the different bifurcation strategies on coronary flow. Our aim is to evaluate the influence of different bifurcation stenting strategies on hemodynamic parameters, both in the main vessel (MV) and side branch (SB). Methods: A computerized mathematical model based on finite volume analysis, was used to evaluate hemodynamic patterns in the following cases: bifurcation with no stenting, simple stenting in main vessel (SS), simple stent in main vessel and "kissing balloon" through the side branch (KB) and "Coulotte Technique" (CT). For each case a 45° and 90° bifurcation configuration was evaluated. Three parameters were measured in MV and SB: volumetric flow and pressure decrease, low shear stress area (<20%(<0.1 Pa) of the value proximal to bifurcation) and vorticity (index of turbulence). Low shear stress has been related to plaque formation and restenosis Results: Overall 90° bifurcations, regardless of the technique, had a worse haemodynamic behaviour (greater decrease in pressure and SB flow) compared to 45°(see table). SS is the technique that provides worst haemodynamic performance.CT technique preserves the best the flow in the SB but only in the 45° configuration, with no advantage over KB in 90°. This behaviour may be explained by differences in turbulence (Vorticity) however the area exposed to low shear stress was the greatest with the CT technique at 45°. Conclusions: In our model, the bifurcation angle has a great influence in the haemodynamic behaviour of different stenting techniques. SS technique has the worst results in terms of haemodynamics. However CT creates the largest area in contact with low shear stress
International
Si
Congress
European Society of Cardiology Congress 2011
960
Place
Paris (Francia)
Reviewers
Si
ISBN/ISSN
0195-668x
Start Date
27/08/2011
End Date
31/08/2011
From page
1047
To page
1047
European Heart Journal ( 2011 ) 32 ( Abstract Supplement ), 1047
Participants
  • Autor: Javier Garcia Garcia (UPM)
  • Autor: Fernando Jaime Manuel Martin (UPM)
  • Autor: Antonio Crespo Martinez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Mecánica de fluidos aplicada a la Ingeniería Industrial
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)