Content Preview: This guide outlines the essential parameters required for an accurate diagnosis of Pulmonary Hypertension (PH) during Right Heart Catheterisation (RHC).

• Mean Pulmonary Arterial Pressure (mPAP): Defined as >20 mmHg at rest.
• Pulmonary Artery Wedge Pressure (PAWP): Essential for distinguishing between pre-capillary and post-capillary PH.
• Pulmonary Vascular Resistance (PVR): Measured in Wood Units to determine the severity of vascular remodelling.
• Clinical Goal: To ensure all diagnostic procedures adhere to the latest evidence-based standards to improve patient outcomes across UK specialist centres.