PMID: 9423945Jan 10, 1998Paper

Pulse duplicator hydrodynamics of four different bileaflet valves in the mitral position

Cardiovascular Surgery : Official Journal of the International Society for Cardiovascular Surgery
Pascal R VerdonckY Van Belleghem

Abstract

The hydrodynamic performance of four different types of bileaflet heart valve was tested both in steady flow conditions and in a newly designed computerized artificial left heart system. Four 29-mm valves, manufactured by either St. Jude Medical, CarboMedics, ATS Medical or Medtronic Parallel were studied under a steady state and in pulsatile conditions by pressure and flow recording and colour Doppler echocardiography in the 'mitral position' at rest and at exercise (cardiac output range 4-30 l/Min). In the steady state, significant differences were measured at peak flows of 30 l/min, with mean (s.d.) increasing pressure drops (mmHg) recorded at 3.48(0.13) (St. Jude Medical), 3.80(0.11) (Medtronic Parallel), 4.31(0.06) (ATS Medical) (P < 0.005), and 4.78(0.06) (Carbo Medics), (P < 0.005). The mean ratio of the closing volume to the stroke volume was comparable for all valves despite one faulty sample. In the pulsatile state the effective orifice area calculated by the Continuity and Gorlin equations decreased from 2.10(0.04) (ATS Medical), 1.95(0.05) (St. Jude Medical), 1.87(0.03) (Carbo Medics) to 1.67(0.02) (Medtronic Parallel) independently of method used. No significant difference was found in the mean ratio of the regurgi...Continue Reading

References

Nov 1, 1992·Medical & Biological Engineering & Computing·P VerdonckJ Vandenbogaerde
Jun 1, 1989·The Annals of Thoracic Surgery·K V AromR W Emery
Feb 1, 1993·Journal of the American College of Cardiology·J ChambersE Sowton
Jun 1, 1996·Cardiovascular Surgery : Official Journal of the International Society for Cardiovascular Surgery·G Van NootenY Van Belleghem

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Citations

Dec 15, 2005·Heart, Lung & Circulation·Guido J Van NootenMichel De Pauw
Sep 26, 2002·Artificial Organs·Pascal R VerdonckGuido Van Nooten
Jun 1, 2006·Artificial Organs·Kishan K NarineGuido J Van Nooten
Jun 1, 2001·The Journal of Thoracic and Cardiovascular Surgery·D GeorgiadisH R Zerkowski
Apr 25, 2008·Current Protocols in Immunology·M von Herrath, J L Whitton

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