NPPB and heart failure: This study aimed to evaluate the twist/untwist parameters of the left ventricle (LV) in patients with heart failure with preserved ejection fraction (HFpEF) measured by ultrasonic two‐dimensional speckle tracking echocardiography (STE) and to examine the correlations between twist parameters and serum N‐terminal pro b‐type natriuretic peptide (NT‐proBNP) as well as conventional two‐dimensional echocardiography (2DE) indexes.