Implantable device and implantable system comprising the same

An implantable system, comprising:

• an implantable device, comprising:
• a body part configured to grasp a pulsatile tissue when the device is implanted in said pulsatile tissue;
• and
• a piezoelectric part being mechanically coupled to the body part and configured to convert a varying shear force transferred from the body part to the piezoelectric part into voltage, wherein the body part comprises:
• a first grasping part being configured to grasp a first tissue part of the pulsatile tissue with a first surface area;
• and
• a second grasping part being configured to grasp a second tissue part of the pulsatile tissue with a second surface area, the first surface area and the second surface area facing each other,
• wherein the piezoelectric part is mechanically interconnected between the first grasping part and the second grasping part,
• wherein the first grasping part and the second grasping part comprise:
• a stiff part in a region directly adjoining the piezoelectric part;
• and
• an elastic part in a region directly adjoining the stiff part;
• and
• a stent adapted to be inserted and deployed within the pulsatile tissue, the implantable device configured to form a sealed junction area with the pulsatile tissue while pressing against an outer circumferential area in an circumferential surface of the stent.