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A pulsatile flow model for in vitro quantitative evaluation of prosthetic valve regurgitation BJMBR
Giuliatti,S.; Gallo Jr.,L.; Almeida-Filho,O.C.; Schmidt,A.; Marin-Neto,J.A.; Pelá,C.A.; Maciel,B.C..
A pulsatile pressure-flow model was developed for in vitro quantitative color Doppler flow mapping studies of valvular regurgitation. The flow through the system was generated by a piston which was driven by stepper motors controlled by a computer. The piston was connected to acrylic chambers designed to simulate "ventricular" and "atrial" heart chambers. Inside the "ventricular" chamber, a prosthetic heart valve was placed at the inflow connection with the "atrial" chamber while another prosthetic valve was positioned at the outflow connection with flexible tubes, elastic balloons and a reservoir arranged to mimic the peripheral circulation. The flow model was filled with a 0.25% corn starch/water suspension to improve Doppler imaging. A continuous flow...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Flow model; Echocardiography; Valvular regurgitation.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000300013
Registros recuperados: 1
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