NR3C2 and atrial fibrillation: ADL, activities of daily living; NYHA, New York Heart Association; eGFR, estimated glomerular filtration rate; LVEF, left ventricular ejection fraction; BNP, brain natriuretic peptide; NT-proBNP, N-terminal prohormone of brain natriuretic peptide; MRA, mineralocorticoid receptor antagonist; AF, atrial fibrillation; IHD, ischemic heart disease