The heart is a pulsating miracle
Foldable heart valves
If a heart valve fails or is worn out, it has to be replaced. Surgeons can use pork as an organic substitute or a mechanical heart valve made of metal. There are also foldable, artificial heart valves (see photo). Because you they can be folded, they can be inserted in a minimally invasive way via a catheter, allowing the patient to avoid open heart surgery.