“…Cardiac tissue engineering is a promising strategy to create implantable cardiac patches with both the structural and functional mechanical properties of native myocardium 5,9,10,15–17 . Current strategies to promote active regeneration of damaged myocardium use scaffolds composed of natural materials, 13–15,18–20 synthetic materials, 11,21–23 extracellular matrix, 13,24–26 decellularized tissues, 27,28 composite materials 11,17,29–31 engineered tissues that integrate the promising functions of biomaterials and stem cell therapies, such as iPS‐CMs, 6,7,11,12,32 as well as modular scaffolds that integrate myocardial components of the tissue into scalable units 33–35 to guide myocardial regeneration. While various studies have shown that engineered scaffolds are capable of contraction, 11,12,14,20,36 and of providing some increase in mechanical function to the injured heart, 11,12,14,20,24 there remains a significant need to develop a functional, engineered cardiac patch that easily integrates with the surrounding tissue to promote the regeneration of myocardial tissue with physiologically relevant contractility 5,9,10,13,15 .…”