| http://www.w3.org/ns/prov#value | - Moreover, such procedures are particularly complicated when the surface of the pertinent organ is moving, as with a beating heart. [0017] Recently, some types of cardiac surgery have been performed through access ports or rather small incisions in the rib cage, instead of in the open field created by cutting through the sternum (a sternotomy) and spreading open the rib cage with a mechanical devic
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