Exploration of Cardiology

Table 1. Hemodynamic definitions of PH.

Definition	Haemodynamic characteristics
PH	mPAP >20 mmHg
Pre-capillary PH	mPAP >20 mmHg PAWP ≤15 mmHg PVR >2 WU
IpcPH	mPAP >20 mmHg PAWP >15 mmHg PVR ≤2 WU
CpcPH	mPAP >20 mmHg PAWP >15 mmHg PVR >2 WU
Exercise PH	mPAP/CO slope between rest and exercise >3 mmHg/L/min

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CO: cardiac output; CpcPH: combined post- and precapillary pulmonary hypertension; IpcPH: isolated postcapillary pulmonary hypertension; mPAP: mean pulmonary arterial pressure; PAWP: pulmonary arterial wedge pressure; PH: pulmonary hypertension; PVR: pulmonary vascular resistance; WU: Wood units. Some patients present with elevated mPAP (> 20 mmHg) but low PVR (≤ 2 WU) and low PAWP (≤ 15 mmHg); this haemodynamic condition may be described by the term ‘unclassified PH’. Reprint with permission form [26]. © European Respiratory Society.

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Acknowledgments

During the preparation of the figures, the authors used ChatGPT (OpenAI, San Francisco, CA, USA) to create the three figures (Figures 1, 3, and 4) and visually optimize the table used in the review. After using the tool, authors reviewed and edited the content as needed and took full responsibility for the content of the publication.

Author contributions

ABR: Conceptualization, Investigation, Writing—original draft, Writing—review & editing. SV: Validation, Writing—review & editing, Supervision. CG: Validation, Writing—review & editing, Supervision. JCV: Validation, Writing—review & editing, Supervision. All authors read and approved the submitted version.

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