TNNT2 and atrial fibrillation: Highly sensitive (hs) cTnT assays, for which the measurements are termed hs-cTnT, have greatly expanded the potential use of cTnT levels as markers in myocardial infarction(MI), even other cardiac diseases such as structural heart disease and atrial fibrillation[14, 15] end-stage renal disease,[16]pulmonary embolism[17],and other conditions[18,19].