ABG results were in the normal ranges (pH: 7.34, PaCO2: 35.5 mmHg, PaO2: 87 mmHg, BE: − 6; HCO3–: 19.3 mmol/l), and her pro-BNP level was 154.2 without PAH treatment. Here, NPPB is linked to pulmonary arterial hypertension.