NPPB and atrial fibrillation: Subsequently, group differences after adjustment for age, sex, left ventricular (LV) EF, body mass index and presence of atrial fibrillation as well as their correlation with N-terminal pro-B-type natriuretic peptide (NT-proBNP) and New York Heart Association (NYHA) class were calculated.<h4>Results</h4>A total of 400 participants were included (94 HCM, 95 AL, 116 ATTR, 95 controls; mean age 58 ± 15 years, 67% male (269/400)).