
Keywords: dilated cardiomyopathy; dobutamine stress test; mitochondrial dysfunction; myocardial contractile reserve; 99mTc-sestamibi scintigraphyBNP, brain natriuretic peptide; COX5B, cytochrome c subunit 5B; DCM, dilated cardiomyopathy; GAPDH, glyceraldehyde-3-pho