| http://www.w3.org/ns/prov#value | - Self-engagement may be actuated by a variety of mechanisms, including a mechanism that signifies lowering of the proximal elements 16 to a predetermined position or a sensor that senses sufficient engagement of the proximal elements 16 with the leaflets LF. It may be appreciated that the method of lowering the proximal elements 16 prior to engagement of the distal elements 18 may be utilized with
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