NPPB and congestive heart failure: Male CHF patients with higher NT-proBNP (Jannuzzi cut-off) showed a significant increase in QRSD (6i.r.7 versus 3i.r.5 ms, p < 0.05), QRSSD (8i.r.7 versus 5i.r.5 ms, p < 0.05), QT (497 ± 98 versus 448 ± 69, p < 0.05), QTSD (11i.r.5 versus 7i.r.6 ms, p < 0.05), ST (381 ± 91 ms, p < 0.05), and STSD (9i.r.