(Fig. 3) Furthermore, we found a strong correlation (r2 = 0.37–0.80) between mPAP at rest to mPAP at PLL and exercise as well as PCWP at rest and PCWP during PLL and exercise in patients with normal and elevated NT-proBNP, with or without atrial fibrillations. Here, NPPB is linked to atrial fibrillation.