TECRL and hyperinsulinemic hypoglycemia, familial, 4: TECRL (trans-2,3-enoyl-CoA reductase-like) deficiency is associated with aberrant mitochondrial function in cardiomyocytes (Hou et al. 2022), due to the alterations in fatty acid metabolism and consequent electrophysiological anomalies (Gelinas et al. 2017).