<prompt> Pre-capillary Pulmonary Hypertension is defined as-PAP25mmHg; PCWPlmmHgPAP 25mmHg; PCWP 15mmHgPCWP 25mmHg; PAP 15mmHgPCWP 25mmHg; PAP 15mmHg  <response>: Ans. is b i.e., PAP 25mmHg; PCWP 15mmHg o Pre-capillary Pulmonary Hypertension is defined by Mean Pulmonary Artery Pressure PAP 25mmHg and Pulmonary Capillary Wedge Pressure PCWP 15mm Hg thereby excluding a cardiac cause.o PH has been defined as an increase in mean pulmonary arterial pressure PAP 25 mmHg at rest as assessed by right heart catheterization RHC.DefinitionCharacteristicsClinical groupsPulmonary- hypertension PHo Mean PAP 25mmHgo AllPre-capillary PHo Mean PAP 25mmHgo PWP 15mmHgo CO normal or reducedo Palmonaty arterial hypertension o PH due to lung diseaseso Chronic thromboembolic PHo PH with under andor multifactorial mechanismsPost-capillary PHo Mean PAP 15 mmHgo PWP 15 mmHgo CO normal or reducedo PH due to left heart disease 