A new self-expanding aortic stent valve with annular fixation: in vitro haemodynamic assessment.

Fiche du document

Auteurs
Date

2009

Type de document
Périmètre
Langue
Identifiant
Source

Serveur académique Lausannois

Relations

Ce document est lié à :
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ejcts.2009.01.052

Ce document est lié à :
info:eu-repo/semantics/altIdentifier/pmid/19409805

Ce document est lié à :
info:eu-repo/semantics/altIdentifier/pissn/1873-734X[electronic]

Ce document est lié à :
info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_D084D98852983

Collection

Serveur Académique Lausannois

Organisation

Université de Lausanne et CHUV

Licences

info:eu-repo/semantics/openAccess , Copying allowed only for non-profit organizations , https://serval.unil.ch/disclaimer

Mots-clés 0

Aortic Valve/surgery; Blood Pressure/physiology; Heart Valve Prosthesis; Heart Valve Prosthesis Implantation; Hemodynamics/physiology; Humans; Models, Cardiovascular; Prosthesis Design; Stents; Surgical Procedures, Minimally Invasive/methods; Ventricular Pressure/physiology

Sujets proches En

Prosthetic heart valves

Citer ce document

M. Vergnat et al., « A new self-expanding aortic stent valve with annular fixation: in vitro haemodynamic assessment. », Serveur académique Lausannois, ID : 10.1016/j.ejcts.2009.01.052

Métriques

Partage / Export

Résumé 0

OBJECTIVE: Balloon-expandable stent valves require flow reduction during implantation (rapid pacing). The present study was designed to compare a self-expanding stent valve with annular fixation versus a balloon-expandable stent valve. METHODS: Implantation of a new self-expanding stent valve with annular fixation (Symetis, Lausanne, Switzerland) was assessed versus balloon-expandable stent valve, in a modified Dynatek Dalta pulse duplicator (sealed port access to the ventricle for transapical route simulation), interfaced with a computer for digital readout, carrying a 25 mm porcine aortic valve. The cardiovascular simulator was programmed to mimic an elderly woman with aortic stenosis: 120/85 mmHg aortic pressure, 60 strokes/min (66.5 ml), 35% systole (2.8 l/min). RESULTS: A total of 450 cardiac cycles was analysed. Stepwise expansion of the self-expanding stent valve with annular fixation (balloon-expandable stent valve) resulted in systolic ventricular increase from 120 to 121 mmHg (126 to 830+/-76 mmHg)*, and left ventricular outflow obstruction with mean transvalvular gradient of 11+/-1.5 mmHg (366+/-202 mmHg)*, systolic aortic pressure dropped distal to the valve from 121 to 64.5+/-2 mmHg (123 to 55+/-30 mmHg) N.S., and output collapsed to 1.9+/-0.06 l/min (0.71+/-0.37 l/min* (before complete obstruction)). No valve migration occurred in either group. (*=p

document thumbnail

Par les mêmes auteurs

Sur les mêmes sujets

Exporter en