TNNT2 and Arrhythmia: There were significant differences in age, New York Heart Association (NYHA), comorbid arrhythmia, systolic blood pressure, high-sensitivity cardiac troponin T (hs-cTnT), BNP levels, estimated glomerular filtration ratio (eGFR), left atrial end-systolic diameter, deceleration time (Dct), and the use of mineralocorticoid receptor antagonists, β-blockers, and loop or thiazide diuretics between patients without AF/AFL/AT, patients with AF/AFL/AT but without ablation, and patients with AF/AFL/AT but with ablation.