Simpson had a heart valve replacement in February and had returned home recently, Currie said.

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One patient who was preparing for a heart valve replacement seemed slightly calmer after her surgeon showed her an intraoperative video of the procedure.

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It's been seven months since Max's last surgery -- an open heart pulmonary valve replacement -- and he has been cleared for all activities by his doctors.

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Traditionally, aortic valve replacement has been performed with open-heart surgery.

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