| http://www.w3.org/ns/prov#value | - For convenience, needle 20 is shown herein having a substantially straight longitudinal axis, however it should be noted that the longitudinal axis of needle 20 may have any curvature facilitating piercing a wall of an organ without risk of perforating that wall, i.e. entry and exit at a same surface of the organ; some such curvatures are taught, in the context of epicardial leads, by Bourgeois et
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