Crown PRT Aortic Heart Valve

CROWN PRT is the latest advancement in stented aortic bioprosthesis technology, featuring surgeon-friendly design, optimal hemodynamics and the patented Phospholipid Reduction Treatment (PRT) to bolster durability through mitigation of calcium uptake.

Crowning achievements
•Continuous Innovation
•Long Term Clinical Evidence
•Global Reach

 Crowning design
•Smooth handling
•Straightforward implantability
•Ample versatility

 Crowning performance
•Optimal hemodynamics
•Minimized patient prosthesis mismatch
•Proven durability

Features

Designed to Open Wide

Single bovine pericardium outer layer for maximized flow areas

Flexible stent for easy manipulation and structural resistance.

CROWN PRT’s two-minute rinse time makes intra-operative valve preparation fast and help save on aortic clamp time.

Flexible stent for easy manipulation and structural resistance.

CROWN PRT’s flexible stent provides resilience towards possible deformations during implant and robustness towards creep over time.


Visible markers for precise orientation and even suture placement.

CROWN PRT’s sewing cuff visible markers help precise valve placement and evenly distribute sutures.

Radiographic markers for sharp X-ray imaging.

CROWN PRT’s sewing cuff offers radio-opaque information on the precise position of commissures through a specially shaped insert, impregnated with tungsten powder.

Slim, elastic sewing cuff for full conformability to the native annulus.

The malleable sewing cuff facilitates implantation by allowing full conformability to all types of annuli, even stiff/calcified and/or irregular roots.

The slim sewing ring also serves this goal and is slightly malleable so that implantation in stiff roots is facilitated.

The lowest profile tissue valve for clearance of coronary ostia and sino-tubular junction.

The malleable sewing cuff facilitates implantation by allowing full conformability to all types of annuli, even stiff/calcified and/or irregular roots.

Clearance of both coronary ostia and sino-tubular junction is assured, even in narrow aortic roots. 
The low/flat profile also allows the surgeon greater visibility of the aortic anatomy during the procedure.

Coronary clearance is ensured by the flat profile, which also facilitates knot lowering.

In-vivo hemodynamics

The capability of LivaNova’s single bovine pericardial outer layer design to maximize flow areas through leaflets that open uniformly and wide has demonstrated excellent in-vivo hemodynamic performance since its introduction in the market in 1982. Literature overviews highlight low pressure gradients, large effective orifice areas and a remarkable regression on the left ventricular mass.

In-vitro durability

CROWN PRT's unique design shows outstanding resistance during accelerated wear testing at ISO 5840 conditions.

“No failures up to 1.5 billion cycles, equivalent to 37.5 years. Over 6 times the minimum requirement.”

In-vivo durability

LivaNova's single bovine pericardial outer layer design has over 21 years of published clinical data
proving already excellent durability without anti-calcification treatment.

“During the whole follow-up, which ranged up to 11 years, we recorded no reoperation because of failed prosthesis.” 

By reducing the nucleation sites for calcium deposition - the phospholipids in the pericardial tissue - the Phospholipid Reduction Treatment (PRT) addresses directly the origin of tissue calcification which may lead to an enhanced valve durability. Tests in subcutaneous rat implants at 60 days demonstrate a significant reduction of calcium content in PRT-treated bovine pericardium patches compared to control.