NPPB and atrial fibrillation: The identification of a responder status through proBNP revealed a profile of patients who were not only younger (61.6 ± 10.1 years vs. 67.8 ± 8.0 years; p < 0.001) but also exhibited a higher BMI (28.8 ± 5.5 kg/m2 vs. 26.6 ± 4.3 kg/m2; p = 0.011) and a lower incidence of AF (18.6% vs. 45.2%; p = 0.001).