Optimal Noninvasive Assessment of Diastolic Heart Failure in Patients with Atrial Fibrillation: Comparison of Tissue Doppler Echocardiography, Left Atrium Size, and Brain Natriuretic Peptide

E/E' could be useful in identifying symptomatic diastolic HF and evaluating the functional state in the process of HF in patients with AF. Moreover, E/E' is able to assess the improvement of diastolic HF in AF.