Diagnosis
At cardiac catheterization, the presence of pulmonary artery hypertension with a normal pulmonary capillary wedge pressure is diagnostic.
Primary pulmonary hypertension must be differentiated from Eisenmenger syndrome as well as from left-sided obstructive lesions resulting in secondary pulmonary venous hypertension - in these conditions the pulmonary arterial wedge pressure is significantly elevated.
Reference:
- Humbert M et al. ESC/ERS Scientific Document Group. 2022 ESC/ERS guidelines for the diagnosis and treatment of pulmonary hypertension. Eur Heart J. 2023 Feb 23:ehad005.
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