NPPB and atrial fibrillation: Considering clinical parameters only (heart rate, age, sex, HFpEF status, NT-proBNP and ongoing atrial fibrillation), a good predictive model (r = 0.84, p < 0.0001) resulted with ongoing atrial fibrillation as strongest predictor in that model (β-15, CI – 19 to − 11, p < 0.0001) and age as the only significant cofactor (β − 0.43, CI − 0.57 to − 0.29, p < 0.0001) while all other factors were excluded, highlighting the importance of SR restoration for improved LA reservoir strain.