aortic ostium

The hard work began after Walters had her aortic valve replaced with one from a cow.
Barbara Walters Opens Up About Her Heart Surgery|Howard Kurtz|February 2, 2011|DAILY BEAST
Doctors there performed a 20-hour surgery in an attempt to repair his aortic dissection.
What Killed Richard Holbrooke?|Casey Schwartz|December 14, 2010|DAILY BEAST
Even though he underwent an aortic valve replacement in 2008, he insists he has no intention of retiring anytime soon.
Jim Lehrer's Cross-Country Fantasy|Sandra McElwaine|April 24, 2010|DAILY BEAST
The mandibular aortic arch is situated close to its inner side, Pl.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour

At this stage there is visible a single aortic trunk passing forwards from the embryo and dividing into two branches.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
The aortic branches to the bodies are larger than in the previous stage, and the bodies themselves fairly vascular.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
These rods are the rudiments of the aortic branches to which the suprarenal bodies are eventually attached.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
Von Baer saw what had escaped Rathke and Huschke, that there were, not three nor four, but as many as five aortic arches.
Form and Function|E. S. (Edward Stuart) Russell

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