Correlation Between CT Pulmonary Angiography Metrics and Right Heart Catheterization Parameters in Pre-Capillary Pulmonary Hypertension
Starting soon
Conditions studied: Pulmonary Hypertension, Precapillary Pulmonary Hypertension, Right Heart Catheterisation, CT Angiography
In brief
Pulmonary hypertension (PH) is a hemodynamic and pathophysiological condition defined by a mean pulmonary artery pressure (mPAP) greater than 20 mmHg at rest, as confirmed by right heart catheterization (RHC) (1). The global prevalence of PH is estimated at approximately 1% of the adult population, rising to 10% or more in individuals over 65 years of age.Pre-capillary pulmonary hypertension, which includes pulmonary arterial hypertension (PAH) and chronic thromboembolic pulmonary hypertension (CTEPH), is characterized by a pulmonary arterial wedge pressure (PAWP) ≤15 mmHg and an elevated pulmonary vascular resistance (PVR) ≥2 Wood units (2) Computed tomography pulmonary angiography (CTPA) is routinely performed in the diagnostic workup of PH and offers a non invasive alternative that can generate multiple quantitative metrics from a single scan (3). Traditional CTPA metrics, including main pulmonary artery diameter (MPAd), the ratio of MPAd to ascending aortic diameter, central pulmonary arteries, and right ventricular to left ventricular diameter (RV/LV ratio) were previously studied in PH patients (4,5,6) Most existing studies have evaluated CTPA metrics in isolation or within single PH subgroups, limiting generalizability across the broader pre-capillary PH population (7). Therefore, this study aims to systematically investigate the correlation between multiple quantitative CTPA metrics and key invasive hemodynamic parameters derived from RHC in patients with confirmed pre-capillary pulmonary hypertension
Key facts
- Study ID
- NCT07667595
- Run by
- Assiut University
- People needed
- 60
- Starts
- 2026-06-30
- Expected to finish
- 2026-07-30
- Last updated by the study team
- 2026-06-25
Who can join
Age: 18 and older. Sex: any. Healthy volunteers: not accepted.
You may qualify if…
- 1-Age ≥ 18 years at time of enrolment. 2-Confirmed pre-capillary pulmonary hypertension on RHC performed at Assiut University Hospital: mPAP > 20 mmHg AND PAWP ≤ 15 mmHg AND PVR ≥ 2 Wood Units.
- 3-WHO PH Clinical Group 1 (PAH), Group 3 (PH due to lung disease/hypoxia), or Group 4 (CTEPH / chronic thromboembolic PH) classification assigned by the PH-MDT.
- 4-Both CTPA and RHC performed within a maximum interval of 4 weeks. b. Exclusion criteria:
- WHO PH Group 2 (PH due to left heart disease) or Group 5 (PH with unclear/multifactorial mechanisms) .
- Active malignancy.
- Pregnancy, confirmed or suspected.
- Contraindication to iodinated contrast agent: eGFR < 30 mL/min/1.73m² OR documented history of severe anaphylactic contrast reaction.
- Inability to sustain breath-hold of ≥ 8 seconds (impairs CTPA quality).
- Initiation or dose escalation of pulmonary vasodilator therapy (endothelin receptor antagonist, PDE5 inhibitor, soluble guanylate cyclase stimulator, or prostanoid) in the interval between CTPA and RHC, or within 4 weeks prior to CTPA.
- Patient refusal to consent or inability to provide informed consent
Where it is running
- Assiut University Hospital — Asyut, Asyut Governorate, Egypt
Full record on ClinicalTrials.gov
Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.