A patch studded with tiny needles may help heart attack survivors recover
The bandage exudes proteins and other molecules that promote muscle cell growth
![illustration of microneedle patch](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/11/112818_MT_microneedle-patch_feat.jpg?fit=860%2C460&ssl=1)
PATCHED UP A new microneedle patch (illustrated in blue) that latches onto the surface of the heart could deliver therapeutic molecules to damaged tissue in heart attack survivors.
Ke Cheng, Zhen Gu