In 2019, this same hydrogel was shown to be safe in humans through an FDA-approved Phase 1 trial in people who suffered a heart attack. As a result of the new preclinical study, the FDA approved an investigational new drug application for the Emory and Georgia Tech researchers to start a clinical trial with the hydrogel. Subscribe for FREE In this case, the injectable hydrogel is intended for children born with a condition that leaves them with an underdeveloped, nonfunctional left ventricle.