GATA4 and acute coronary syndrome: cTnT has been demonstratedto be exclusively present in cardiac muscle, and is a proven diagnostic and riskstratification biomarker in patients with acute coronary syndromes.Nkx2.5 and GATA-4 are required for specification ofthe cardiac muscle phenotype (19).Nkx2.5 regulates the transcription of several cardiac genesincluding α-sarcomeric actin and GATA-4 (20).