Pulmonary Hypeension is defined as Pulmonary Aery Pressure:

Answer is D (>25mmHg): PH has been defined as an increase in mean pulmonary aerial pressure (PAP) > 25 mmHg at rest as assessed by right hea catheterization (RHO. Definition Characteristics Clinical group(s) * All Pulmonary hypeension (PH) * Mean PAP >25 mmHg Pre-capillary PH * Mean PAP >25 mmHg * Pulmonary aerial hypeension * PWP 15mmHg * PH due to lung diseases * CO normal or reduced * Chronic thromboembolic PH * PH with under and/or multifactorial mechanisms Post-capillary PH * Mean PAP >25 mmHg * PH due to left hea disease * PWP >15 mmHg * CO normal or reduced Note: High CO can be present in cases of hyperkinetic conditions such as systemic to pulmonary shunts (only in the pulmonary circulation), Anaemia. Hypehyroidism, etc. CO =cardiac output; PAP =pulmonary aerial pressure; PH = pulmonary hypeension; PWP =pulmonary wedge pressure;