NPPB and pulmonary arterial hypertension: The present study largely confirms these findings and demonstrates that exceedance of the 0.6 mV cut-off of “R V1, V2 + S I, aVL − S V1” could be able to predict the diagnosis of (severe) PH, increased (NT-pro-) BNP levels, and high-risk category (only patients with PAH) at the time of diagnosis.