High circulating levels of cTnI and cTnT are commonly associated with diseased states such as acute myocardial infarction, coronary microembolization,30,31 aortic stenosis,32 heart failure (HF), myopericarditis,33 and atrial fibrillation, or in healthy subjects, in the condition of prolonged exercise. The gene discussed is TNNT2; the disease is hydrops fetalis.