The aortic valve regulates blood flow by opening and closing, and when it stops working an aortic valve replacement (AVR) surgery must be done for blood flow to resume like normal, delivering oxygen ...

LOS ANGELES, CA—In patients ages 60 years or younger undergoing surgical aortic valve replacement, mechanical valves are associated with a survival benefit compared with bioprosthetic valves, ...

Source Reference: Bowdish ME, et al "Bioprosthetic vs mechanical aortic valve replacement in patients 40-75 years" J Am Coll Cardiol 2025; DOI: 10.1016/j.jacc.2025.01.013.

"The decision between a bioprosthetic and mechanical valve is one of the most consequential for patients requiring aortic valve replacement," said Dr. Michael Bowdish, lead author of the study and ...

LOS ANGELES—January 25, 2025—A late-breaking study presented today at the 2025 Society of Thoracic Surgeons (STS) Annual Meeting reveals that mechanical aortic valve replacements (AVRs ...

"Through the Swedish Cardiac Surgery Register (which is part of the SWEDEHEART register) we identified more than 5,000 patients who received a mechanical aortic valve in Sweden between 2003 and 2018.

In replacement aortic valve procedures, bioprosthetic valves have become increasingly more common than mechanical replacements, since those made out of animal tissue are less likely to cause blood ...

It involves replacing the diseased valve with a prosthetic valve, made either of metal (mechanical valve) or from the tissue of a human, pig, or cow (bioprosthetic valve).

Bowdish's team reported that between bioprosthetic valves and mechanical valves, use of the latter dropped from 20% to 10% ...