NPPB and heart failure: The observation that decreased BRS and LF may predict hospitalization due to heart failure decompensation in clinically stable patients with LV systolic dysfunction, even after adjusting for other well-known clinical parameters (such as LVEF, NYHA class, impaired renal function, diuretics using, BNP level, anemia, LA size, LV and RV failure signs), is the principal finding of our study.