From the computer model, the researchers can then 3D print the replica hearts using a polymer-based ink. The result is a soft, flexible shell in the exact shape of the patient’s own heart.

Then, in a single continuous procedure, the team printed 3D models of those materials into the working cardiac microphysiological device, or heart on a chip. The printing of the heart on a chip.

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A new type of tissue-engineered cardiac patch could not only seal defective areas of the heart, as has been the case up to now, but also heal them. An interdisciplinary team led by ETH Zurich has ...