An interventional study of right heart catheterization for measure pulmonary artery pressure in Schistosomiasis, sponsored by Sohag University. Not yet recruiting at 1 site in Egypt. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-07-16.
Sponsored by Sohag University · Not applicable, Interventional, and Treatment
Pulmonary Arterial Hypertension is a progressive and potentially fatal cardiopulmonary disorder characterized by remodeling of the pulmonary vasculature, progressive elevation of pulmonary vascular resistance (PVR), and eventual right ventricular (RV) failure.
According to the 2022 European Society of Cardiology/European Respiratory Society (ESC/ERS) guidelines, pulmonary hypertension is currently defined hemodynamically by a mean pulmonary arterial pressure (mPAP) >20 mmHg measured by right heart catheterization, while pulmonary arterial hypertension is additionally characterized by pulmonary arterial wedge pressure (PAWP) ≤15 mmHg and PVR >2 Wood units.
Schistosomiasis-associated pulmonary arterial hypertension (Sch-PAH) is classified within Group 1 PAH and represents one of the most important causes of PAH in endemic regions, particularly in developing countries such as Egypt and Brazil.
Schistosomiasis is considered the second most prevalent parasitic disease worldwide after malaria, affecting more than 200 million individuals globally. Chronic hepatosplenic schistosomiasis may lead to porto-systemic shunting, allowing parasite eggs to embolize into the pulmonary circulation, triggering chronic inflammation, endothelial dysfunction, and pulmonary vascular remodeling.
The pathological changes observed in Sch-PAH resemble those seen in idiopathic PAH, including medial hypertrophy, intimal fibrosis, and plexiform lesions. However, several studies suggest that patients with Sch-PAH may exhibit better long-term survival compared with idiopathic PAH despite comparable pulmonary hemodynamic impairment.
The mechanisms underlying this relatively favorable prognosis remain incompletely understood.
Right ventricular adaptation to increased afterload is currently recognized as one of the principal determinants of prognosis in PAH.
79 studies on the registry are indexed under Schistosomiasis; 14 are open to participants now.
This study's planned enrollment of 50 is below the median of 289 across 52 interventional studies indexed under Schistosomiasis.
Browse Schistosomiasis studies →Sohag University is the lead sponsor of 1,230 studies on the registry; 636 are open to participants now.
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Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.
COPD
Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Procedure: right heart catheterization for measure pulmonary artery pressure
right heart catheterization for measure pulmonary artery pressure Through swan ganz catheter
Right ventricular-pulmonary arterial coupling quantified by the TAPSE/PASP ratio measured by transthoracic echocardiography at baseline
The tricuspid annular plane systolic excursion to pulmonary artery systolic pressure (TAPSE/PASP) ratio will be measured by standard transthoracic echocardiography in all participants at the study assessment. TAPSE will be measured in millimeters (mm) using M-mode echocardiography, and PASP will be estimated in mmHg from the peak tricuspid regurgitation velocity. The TAPSE/PASP ratio (mm/mmHg) will be calculated for each participant and reported as a continuous variable (mean ± standard deviation or median \[interquartile range\], depending on data distribution).
Time frame: 1 year
Start is estimated for Jul 2026; primary completion for Jul 2027, 12 months later.
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