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REstoration with calcifediol of VItamin D deficiency in pulmonary Arterial Hypertension patients (REVIDAH study)
EU CTIS ID: 2025-521694-14-00
What this study is testing
To analyze whether a vitamin D supplement (0,266 mg calcifediol, once every ten days for the first 12 weeks and once every two weeks in the following 12 weeks) induces clinical improvement without clinical worsening at week 24 compared with placebo. Clinical improvement is defined as a change in at least two of the following variables: 1) increase in 6 minutes walking distance (6MWD) >= 10% or more than 30 m, 2) change from intermediate-2 low or intermediate-high risk to low risk score or change from intermediate-high to intermediatelow risk according to 2022 ERS/ESC guidelines), 3) reduction in BNP or NT-proBNP >= 30%, 4) increase in the TAPSE/SPAP ratio >=25%.Clinical worsening is defined as any of the following events: a) hospitalization related to PAH, b) therapeutic escalation, c) progression of symptoms, d) lung or cardiopulmonary transplantation, e) atrial septostomy and f) mortality related to PAH.
- Therapeutic use (Phase IV)
A plain-language read of the study's public EU CTIS listing. The study team confirms the details.
Who can take part
You may be able to join if
- Male and female patients aged 18 -75 years.
- Patients with diagnosis of PAH of the following types according to 2022 ERS/ESC guidelines: idiopathic, hereditary, drug- and toxin-induced PAH or associated to connective tissues disease.
- Patients who are stable and treated with standard medications for PAH on monotherapy or with combinations of drugs, including calcium channel blockers, phosphodiesterase type 5 inhibitors (PDE5i), endothelin receptor antagonists (ERA), prostacyclin analogues or selexipag or with stable dose of diuretics who had no treatment modification for at least 6 weeks before randomization.
- Patients with an intermediate-low and intermediate-high risk score according to 2022 ERS/ESC guidelines.
- Patients with severe deficiency of vitD, defined herein as plasma or serum 25(OH)vitD levels equal to or lower than 12 ng/ml.
- Patients who can understand and follow instructions, and who are able to participate in the study for the entire study.
You likely can't join if
- Participation in another interventional clinical study within 30 days before screening.
- Exclusion criteria related to pulmonary disease: a. All types of PH except subtypes of PAH specified in the inclusion criteria. b. Evidence of clinically significant restrictive or obstructive parenchymal lung diseases in the judgement of the investigator. c. Severe congenital abnormalities of the lungs, thorax, and diaphragm. d. Severe restrictive lung disease (total lung capacity <60%). e. Moderate obstructive lung disease (forced expiratory volume in 1 second/forced vital capacity <50%). f. Confirmed obstructive sleep apnoea. g. Severe diffusion impairment (DLCO <30% predicted). h. History or active state of serious haemoptysis/pulmonary haemorrhage, including those managed by bronchial artery embolisation
- Exclusion criterion related to hypoxia (pulse oximeter at rest): Peripheral capillary oxygen saturation <88% despite supplemental oxygen therapy (≤4 L/min) at rest.
- Cardiovascular exclusion criteria: a. Uncontrolled arterial hypertension (systolic blood pressure (SBP) >180 mm Hg and/or diastolic BP (DBP) >110 mm Hg). b. SBP <95 mm Hg before and at randomisation. c. Resting heart rate in the awake patient <50 bpm or >105 bpm. d. Permanent atrial fibrillation and new onset of atrial fibrillation within the 3 months before screening. e. Left ventricular systolic dysfunction by echocardiography (<40%, Simpson's methodology). f. Hypertrophic obstructive cardiomyopathy. g. Severe proven or suspected coronary artery disease. h. Clinical evidence of symptomatic atherosclerotic disease. i. History of stroke within 3 months before and at randomisation. j. Congenital or acquired valvular or myocardial disease if clinically significant apart from tricuspid valvular insufficiency due to PAH. k. Three or more of the following left ventricular disease/dysfunction risk factors: i. Body mass index≥30 kg/m2, ii. History of essential hypertension, iii. Diabetes mellitus of any type, iv. History of significant coronary disease.
- Exclusion criteria related to disorders in organ function: a. Clinically relevant hepatic dysfunction indicated by: i. Bilirubin >2 times ULN, and/or ii. Alanine aminotransferase or aspartate aminotransferase >3 times upper limit of normal. b. Signs of severe hepatic insufficiency (Child -Pugh C), and/or c. Renal insufficiency. a. Other co-morbidities impairing exercise capacity.
- Previous diagnosis of osteoporosis, osteomalacia or other alterations of calcium or phosphorus homeostasis.
See the full eligibility criteria
Who can join
- Male and female patients aged 18 -75 years.
- Patients with diagnosis of PAH of the following types according to 2022 ERS/ESC guidelines: idiopathic, hereditary, drug- and toxin-induced PAH or associated to connective tissues disease.
- Patients who are stable and treated with standard medications for PAH on monotherapy or with combinations of drugs, including calcium channel blockers, phosphodiesterase type 5 inhibitors (PDE5i), endothelin receptor antagonists (ERA), prostacyclin analogues or selexipag or with stable dose of diuretics who had no treatment modification for at least 6 weeks before randomization.
- Patients with an intermediate-low and intermediate-high risk score according to 2022 ERS/ESC guidelines.
- Patients with severe deficiency of vitD, defined herein as plasma or serum 25(OH)vitD levels equal to or lower than 12 ng/ml.
- Patients who can understand and follow instructions, and who are able to participate in the study for the entire study.
- Patients must have given their written informed consent to participate in the study after having received adequate previous information and before any study-specific procedures.
What rules you out
- Participation in another interventional clinical study within 30 days before screening.
- Exclusion criteria related to pulmonary disease: a. All types of PH except subtypes of PAH specified in the inclusion criteria. b. Evidence of clinically significant restrictive or obstructive parenchymal lung diseases in the judgement of the investigator. c. Severe congenital abnormalities of the lungs, thorax, and diaphragm. d. Severe restrictive lung disease (total lung capacity <60%). e. Moderate obstructive lung disease (forced expiratory volume in 1 second/forced vital capacity <50%). f. Confirmed obstructive sleep apnoea. g. Severe diffusion impairment (DLCO <30% predicted). h. History or active state of serious haemoptysis/pulmonary haemorrhage, including those managed by bronchial artery embolisation
- Exclusion criterion related to hypoxia (pulse oximeter at rest): Peripheral capillary oxygen saturation <88% despite supplemental oxygen therapy (≤4 L/min) at rest.
- Cardiovascular exclusion criteria: a. Uncontrolled arterial hypertension (systolic blood pressure (SBP) >180 mm Hg and/or diastolic BP (DBP) >110 mm Hg). b. SBP <95 mm Hg before and at randomisation. c. Resting heart rate in the awake patient <50 bpm or >105 bpm. d. Permanent atrial fibrillation and new onset of atrial fibrillation within the 3 months before screening. e. Left ventricular systolic dysfunction by echocardiography (<40%, Simpson's methodology). f. Hypertrophic obstructive cardiomyopathy. g. Severe proven or suspected coronary artery disease. h. Clinical evidence of symptomatic atherosclerotic disease. i. History of stroke within 3 months before and at randomisation. j. Congenital or acquired valvular or myocardial disease if clinically significant apart from tricuspid valvular insufficiency due to PAH. k. Three or more of the following left ventricular disease/dysfunction risk factors: i. Body mass index≥30 kg/m2, ii. History of essential hypertension, iii. Diabetes mellitus of any type, iv. History of significant coronary disease.
- Exclusion criteria related to disorders in organ function: a. Clinically relevant hepatic dysfunction indicated by: i. Bilirubin >2 times ULN, and/or ii. Alanine aminotransferase or aspartate aminotransferase >3 times upper limit of normal. b. Signs of severe hepatic insufficiency (Child -Pugh C), and/or c. Renal insufficiency. a. Other co-morbidities impairing exercise capacity.
- Previous diagnosis of osteoporosis, osteomalacia or other alterations of calcium or phosphorus homeostasis.
- Active treatment with vitD supplements, bisphosphonates, calcitonin, parathormone or mitramicine.
- Previous randomization to treatment during this study (no re-randomization).
- Pregnant women or breastfeeding women, or women with childbearing potential not using an effective contraception method throughout the study.
- Patients with a medical disorder, condition, or history of such that would impair the patient's ability to participate in or complete this study, in the opinion of the investigator.
- Patients with substance abuse (eg, alcohol or drug abuse) within the previous 3 months before and at randomisation.
- Patients with underlying medical disorders with an anticipated life expectancy <2 years.
- Patients with a history of severe allergies or multiple drug allergies or with hypersensitivity to the investigational drug or any of the excipients.
- Patients unable to perform a valid 6MWD test (eg, orthopaedic disease or peripheral artery occlusive disease that affects the patient's ability to walk).
- Excluded medication/treatment: active treatment with digoxin.
The study team makes the final eligibility decision.
Questions & answers
Do participants get paid in this trial?
This listing doesn't specify compensation. Many trials still reimburse travel or offer a stipend, so it's worth asking the study team when you connect.
Is it free to join, and do I need insurance?
Searching and applying through BridgeMD is free. In clinical trials the study-related treatment and visits are generally provided at no cost to you. You usually don't need insurance to take part - confirm specifics with the study team.
How long does this study last?
The listing doesn't state an exact length. The study team walks you through the schedule and number of visits before you decide to enroll.
Who can join this trial?
This study is enrolling all sexes, 18-64 years, 65+ years. The study team makes the final eligibility decision.
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BridgeMD is an information and trial-matching tool - not medical advice, and not the study sponsor. Details come from EU CTIS; the study team decides eligibility.