Scientists in Israel unveiled a 3D print of a heart with human tissue and vessels on Monday, calling it a first and a"major medical breakthrough" that advances possibilities for transplants.
But the scientists said many challenges remain before fully working 3D printed hearts would be available for transplant into patients. Cardiovascular disease is the world's leading cause of death, according to the World Health Organization, and transplants are currently the only option available for patients in the worst cases.When they do benefit, they can fall victim to their bodies rejecting the transplant -- a problem the researchers are seeking to overcome.
Using the patient's own tissue was important to eliminate the risk of an implant provoking an immune response and being rejected, Dvir said.