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For patients with mild pulmonary hypertension, the usual go-to measures — mean pulmonary artery pressure and vascular resistance — may fall short when it comes to predicting mortality risk. A large international study found that pulmonary artery stiffness and right-ventricular function were significantly better predictors of death. The findings suggest clinicians may need to rethink how they assess hemodynamic risk in this often-overlooked patient group.
For patients with mild pulmonary hypertension (PH), the standard hemodynamic metrics doctors rely on — mean pulmonary artery pressure (mPAP) and pulmonary vascular resistance (PVR) — may offer little when it comes to predicting who's at greatest risk of dying. A major international study published in Chest found that these conventional measures offered no meaningful mortality prediction in mild PH patients, while measures of arterial stiffness and right-heart function told a very different story.
Researchers analyzed data from over 16,900 treatment-naïve adults with PH from an international meta-registry. Among the 1,095 patients classified as having mild PH, those with higher arterial elastance, lower stroke volume index, and elevated heart rate faced significantly greater mortality risk — even after adjusting for other clinical factors. Results held consistent across different PH subtypes.
Key Takeaways:
Why it matters: Mild PH is often underestimated clinically, and relying solely on PVR may cause physicians to miss patients who are quietly at high risk. Incorporating artery stiffness and right-ventricular performance metrics into routine hemodynamic assessments could meaningfully improve risk stratification and support earlier intervention.
