EW Expands The ALLIANCE Program - Introduces Sapien X4S At NY Valves

Research evidence excerpt

EW Expands The ALLIANCE Program - Introduces Sapien X4S At NY Valves

TD Cowen Edwards Lifesciences Corp.

Global Research June 26, 2026

Improved Neosinus Washout Addresses Emerging Durability Considerations

A recurring theme throughout the presentation was the increasing recognition that valve

performance extends beyond simple transvalvular gradients. Investigators emphasized that

neosinus washout has emerged as an important design consideration because stagnant flow

within the neosinus may contribute to leaflet thrombosis and long-term valve degeneration.

According to investigators, the X4S incorporates additional design modifications specifically

intended to optimize neosinus flow dynamics while maintaining consistent leaflet stress across

all deployment diameters.

A New Delivery System Designed Around Procedural Precision

Sapien X4S is delivered through the newly developed X4S delivery system, which retains much

of the familiar ergonomics of the Commander platform while incorporating several workflow

improvements.

The valve now arrives pre-mounted directly on the deployment balloon, eliminating the need

for in-procedure valve loading and simplifying procedural preparation. The delivery catheter

incorporates a flex wheel that facilitates navigation through the aortic arch, while retaining the

familiar fine positioning control used during deployment.

Perhaps the most notable addition is a dedicated valve rotation control, allowing near one-to-

one rotational adjustment during implantation to intentionally achieve commissural alignment.

Operators described the system as intuitive and straightforward, with simple rotational

adjustments performed prior to valve deployment using fluoroscopic commissural markers.