Left atrial appendage closure device with passive fixation

A medical device system, comprising:

• a catheter having a lumen extending from a proximal opening to a distal opening;
• a core wire slidably disposed within the lumen;
• and
• an occlusive medical implant for implantation within a left atrial appendage releasably attached at a distal end of the core wire, the occlusive medical implant comprising:
• an expandable framework configured to self-expand from a collapsed configuration to an expanded configuration when unconstrained by the catheter;
• an occlusive element disposed over at least a portion of the expandable framework;
• a proximal hub fixedly attached to a proximal end of the expandable framework;
• a distal hub fixedly attached to a distal end of the expandable framework;
• and
• a proximal beam extending distally from the proximal hub within an interior of the expandable framework, wherein the proximal beam is rotatable relative to the proximal hub;
• wherein at least a portion of the expandable framework is mechanically expandable from the expanded configuration to a securement configuration;
• wherein when the occlusive medical implant is disposed within the left atrial appendage, the expandable framework exerts a first radial force on the left atrial appendage in the expanded configuration and the expandable framework exerts a second radial force on the left atrial appendage in the securement configuration;
• wherein the second radial force is greater than the first radial force.

An occlusive medical implant for implantation within a left atrial appendage, comprising:

• an expandable framework configured to self-expand from a collapsed configuration to an expanded configuration;
• an occlusive element disposed on a proximal portion of the expandable framework;
• a proximal hub fixedly attached to a proximal end of the expandable framework;
• a distal hub fixedly attached to a distal end of the expandable framework;
• and
• a proximal beam extending distally from the proximal hub within an interior of the expandable framework, wherein the proximal beam is rotatable relative to the proximal hub;
• wherein at least a portion of the expandable framework is mechanically expandable from the expanded configuration to a securement configuration;
• wherein the expandable framework has a first radialmost outer extent in the expanded configuration and a second radialmost outer extent in the securement configuration;
• wherein the second radialmost outer extent is greater than the first radialmost outer extent.