Disclosed herein is a pressure sensing left atrial occluding implantable medical device. The implantable medical device includes a cardiac plug and a micro electro-mechanical system (“MEMS”). The cardiac plug includes an expandable lobe and an expandable disc proximal the lobe. The expandable lobe is configured to expand into an anchoring arrangement within the left atrial appendage. The expandable lobe is configured to expand into an occluding arrangement with the left atrial appendage. The MEMS is coupled to the cardiac plug proximal of the disc. The MEMS is configured to sense surrounding fluid pressure.
