Medical Professionals


Working with Medical Professionals : Real Progress from Real Change


For years, the strategy of bileaflet valve manufacturers and medical professionals have been to emulate the familiar design of the original St. Jude Medical valve. At best they have achieved comparable clinical results.

Working with medical professionals, On-X carefully re-engineered virtually every aspect of bileaflet design and manufacturing processes for the On-X valve. As a result, On-X valves have established an entirely new standard of valve performance, surpassing all other valves in advantage to the patient’s quality of life.

A new hemodynamically correct profile and pristine interior contours of pure carbon provide across-the-board improvements over traditional designs. The On-X valve is at the top of the class in virtually every category of valve performance.

Cumulative clinical data demonstrate that the On-X valve has lower rates of thrombotic events than other mechanical valves, particularly when faced with noncompliance to anticoagulation therapy. This experience has resulted in new clinical studies aimed at re-defining the lower limits of anticoagulation therapy for the valve to reduce the potential for bleeding in On-X valve patients.


On-X Prosthetic Heart Valve Videos


On-X Prosthetic Heart Valve Implant Technique Video On-X Prosthetic Heart Valve PROACT Clinical Trial Video On-X Prosthetic Heart Valve Patient Education Video


Instructions for Use


Product Instructions for Use (IFU) information on the On-X Prosthetic Heart Valve, On-X Ascending Aortic Prosthesis, On-X Prosthetic Heart Valve Instruments, for Chord-X ePTFE Suture, and for CarbonAid and CarbonMini.


Reduced Anticoagulation


The On-X aortic heart valve is the only mechanical valve FDA approved and clinically proven to be safer with less warfarin. In a prospective randomized clinical trial, On-X heart valve patients with a reduced warfarin dose had 65% fewer harmful bleeding events without an increase in stroke risk. The On-X Aortic Heart Valve is designed to minimize hemostasis and hemolysis, making it the only mechanical valve that is safer with less anticoagulation.


On-X Prosthetic Heart Valve Design and Features


Every aspect of the On-X heart valve plays a role in maximizing benefits for the recipient. The scope of innovations in the design reflects On-X Life Technologies, Inc.’s commitment to perfection in creating the On-X Prosthetic Heart Valve. Totally free of silicon. The purity and finish of On-X carbon coatings assures the greatest biocompatibility for the On-X valve design. The human body does not react against its pure carbon surfaces. Advanced processing technology yields highly polished and contoured features in the critical pivot area, which minimizes opportunities for clots to form or adhere.


Echocardiography Aortic View


Aortic heart valves can be surgically replaced with artificial or prosthetic heart valves. There are two types of prosthetic heart valves, tissue valves and mechanical valves. Tissue valves are not as durable as mechanical valves, and are much more likely to require reoperation due to early failure, especially for younger patients. Gradual degradation of tissue valves can cause symptoms to return for several years prior to eventual reoperation.




The On-X valve’s hemodynamic performance is one of the very best among valve prostheses, particularly in smaller sizes. Table 1 compares the mean pressure gradients and maximum body surface area of the On-X valve size 19 with other competitors’ valves fitting a 19mm annulus.


Clinical Results


Learn more about the clinical results of the On-X Heart Valves and how they compare against other valves.


Product IFU

Learn the Instructions for Use (IFU) for the On-X product groups.

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MRI Safety

On-X Prosthetic Heart Valve MRI Safety Information

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