Data provided by company:

• Allows placement of a larger pyrolytic carbon orifice, leading to an increased effective orifice area (EOA), lower pressure gradients and significantly improved hemodynamic performance
• The key to the Masters HP Series is its redesigned sewing cuff. The cuff has been designed to facilitate supra-annular placement, allowing for an increase in orifice size for a given tissue annulus diameter.

Comments Surgery:

• Bileaflet design, supra-annular placement, rotation mechanism for intraoperative adjustment, standard, flex and expanded cuff, size: 17-27mm

Comments Echocardiography:

• EOAI identical for masters series and masters HP series.

References:

1. Copyright St. Jude Medical
2. Zoghbi et al. Recommendations for Evaluation of Prosthetic Valves with Echocardiography and Doppler Ultrasound, J Am Soc Echocardiogr. 2009 Sep;22 (9):975-1014.
   
3. EOA Comparison in vitro @ 5lpm