The Duke Heart Patch is created similarly to other artificially-engineered Cardiac tissues: human pluripotent stem cells are injected into a support structure and are supplied with nutrients and growth factors. Under specific conditions, the stem cells can differentiate into cardiomyocytes and other types of tissues found in the heart. Researchers were successful in growing a Patch 2.5 square inches (16 square cm) and five to eight cells thick in size that resembled native Cardiac Tissue in structure and was fully functional both electrically and mechanically.
Moreover, after implanting the Heart patches onto rat and mouse hearts, the researchers saw that the patches maintained their function and became vascularized and integrated with the heart’s native tissues.
Here’s a short video showing off the new Heart patch: