William O'Neill, MD

Co-Founder & Medical Advisor, bioaccess® · Pioneer in Cardiovascular Medicine · MSCAI · FACC

About Dr. O'Neill

Dr. William O'Neill is a legend in cardiovascular medicine who performed the first transvascular aortic valve replacement procedure in the United States — a landmark achievement that transformed cardiac care globally.

His pioneering clinical expertise and lifelong commitment to pushing the boundaries of medical innovation form the scientific foundation of bioaccess®. Dr. O'Neill's vision ensures that every clinical trial managed by bioaccess® meets the highest standards of scientific rigor and patient safety.

Landmark Achievements

Landmark Publication

Hanzel GS, Abbas AE, Schreiber TL, O'Neill WW. "Account of the First Transcatheter Aortic Valve Replacement in North America." JACC: Cardiovascular Interventions, 2022, 15(23). DOI: 10.1016/j.jcin.2022.09.042.

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