About: http://webisa.webdatacommons.org/6234450

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In addition, mechanical systems for lifting the heart, particularly to enable access to the heart for performing valve surgery, have been proposed as exemplified in the apparatus disclosed in U.S. Pat. No. 6,558,318.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk