From an InterestingEngineering.com online article:

“We are extremely proud of what we have accomplished, from the ability to 3D bioprint human cardiac tissue last summer to a mini heart with full structure now. These milestones are a testament to the hard work of our team and the proprietary process we have developed that enables this type of scientific achievement,” said Birla in a press release.  “We believe we are at the forefront of whole heart bioengineering, a field that has matured quickly over the last year, and well-positioned to continue our rapid scientific advancement.”

BIOLIFE4D, the biotech company based out of Chicago, announced it has successfully demonstrated the ability to 3D bioprint a mini human heart, a big step in someday printing out a full-sized human heart that can be used for a transplant.

To read more: https://interestingengineering.com/a-company-creates-the-first-3d-printed-mini-heart?_source=newsletter&_campaign=EVmJjW5YyX1pq&_uid=46dBBxnxd7&_h=0c209d493fa27bb2c39469a873cbbd733289c833&utm_source=newsletter&utm_medium=mailing&utm_campaign=Newsletter-10-09-2019