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Right Heart Catheterization

Right heart catheterization (RHC) is mandatory in the diagnosis of PH.

  • In CTEPH, the RHC has additional importance, as pulmonary vascular resistance is the most important determinant of prognosis and the risk associated with PTE.*18
  • CTEPH is defined as precapillary PH as assessed by RHC (mean PAP ≥25 mmHg, PCWP ≤15 mmHg) in the presence of multiple chronic/organized occlusive thrombi/emboli in the elastic pulmonary arteries (main, lobar, segmental, subsegmental) after at least 3 months of effective anticoagulation.5

Normal ranges of hemodynamic values.24

*Also called pulmonary endarterectomy or PEA.

  • Learn about common myths and realities concerning CTEPH and its diagnosis in the following videos:

  • Is a V/Q scan enough to make a definitive diagnosis?

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  • Can CT pulmonary angiography be used to rule out CTEPH?

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  • If signs point to PH, is there a need for a V/Q scan?

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Pulmonary vascular resistance is an important determinant of CTEPH prognosis.