Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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UNKNOWN
NA
50 participants
INTERVENTIONAL
2008-10-31
2021-12-31
Brief Summary
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Preliminary data suggest that offspring of CMS patients may display pulmonary and systemic vascular dysfunction. Antioxidant administration is know to improve vascular function. We will test the acute effect of Vitamin C in this setting.
Finally, since there is considerable inter-individual variability of pulmonary artery pressure among CMS patients and the presence of a patent foramen ovale (PFO)is increased in clinical conditions associated with pulmonary hypertension and hypoxemia, we will assess the prevalence of PFO in healthy high altitude dwellers and in CMS patients and its effects on pulmonary artery pressure at rest and during mild exercise.
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
DOUBLE
Study Groups
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Antioxidant
Vitamin C and E
1 month, 1g Vitamin C and 400 IE Vitamin E or Acute, 1g Vitamin C (in the offspring)
Control
Placebo
1 month Placebo
Interventions
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Vitamin C and E
1 month, 1g Vitamin C and 400 IE Vitamin E or Acute, 1g Vitamin C (in the offspring)
Placebo
1 month Placebo
Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
* Lung disease
* Arterial Hypertension
10 Years
ALL
Yes
Sponsors
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Instituto Boliviano de Biologia de Altura
UNKNOWN
Universitad Major de S. Andres, La Paz, Bolivia
UNKNOWN
University of Lausanne Hospitals
OTHER
Responsible Party
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Urs Scherrer
Prof
Locations
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Istituto Boliviano de Biologia de Altura, Universitad S. Andres
La Paz, , Bolivia
University Hospital Lausanne, Botnar Center for Extreme Medicine
Lausanne, Canton of Vaud, Switzerland
Countries
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References
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Bailey DM, Culcasi M, Filipponi T, Brugniaux JV, Stacey BS, Marley CJ, Soria R, Rimoldi SF, Cerny D, Rexhaj E, Pratali L, Salmon CS, Jauregui CM, Villena M, Villafuerte F, Rockenbauer A, Pietri S, Scherrer U, Sartori C. EPR spectroscopic evidence of iron-catalysed free radical formation in chronic mountain sickness: Dietary causes and vascular consequences. Free Radic Biol Med. 2022 May 1;184:99-113. doi: 10.1016/j.freeradbiomed.2022.03.028. Epub 2022 Apr 6.
Rexhaj E, Rimoldi SF, Pratali L, Brenner R, Andries D, Soria R, Salinas C, Villena M, Romero C, Allemann Y, Lovis A, Heinzer R, Sartori C, Scherrer U. Sleep-Disordered Breathing and Vascular Function in Patients With Chronic Mountain Sickness and Healthy High-Altitude Dwellers. Chest. 2016 Apr;149(4):991-8. doi: 10.1378/chest.15-1450. Epub 2016 Jan 12.
Brenner R, Pratali L, Rimoldi SF, Murillo Jauregui CX, Soria R, Rexhaj E, Salinas Salmon C, Villena M, Romero C, Sartori C, Allemann Y, Scherrer U. Exaggerated pulmonary hypertension and right ventricular dysfunction in high-altitude dwellers with patent foramen ovale. Chest. 2015 Apr;147(4):1072-1079. doi: 10.1378/chest.14-1353.
Pratali L, Allemann Y, Rimoldi SF, Faita F, Hutter D, Rexhaj E, Brenner R, Bailey DM, Sartori C, Salmon CS, Villena M, Scherrer U, Picano E, Sicari R. RV contractility and exercise-induced pulmonary hypertension in chronic mountain sickness: a stress echocardiographic and tissue Doppler imaging study. JACC Cardiovasc Imaging. 2013 Dec;6(12):1287-97. doi: 10.1016/j.jcmg.2013.08.007. Epub 2013 Oct 23.
Bailey DM, Rimoldi SF, Rexhaj E, Pratali L, Salinas Salmon C, Villena M, McEneny J, Young IS, Nicod P, Allemann Y, Scherrer U, Sartori C. Oxidative-nitrosative stress and systemic vascular function in highlanders with and without exaggerated hypoxemia. Chest. 2013 Feb 1;143(2):444-451. doi: 10.1378/chest.12-0728.
Pratali L, Rimoldi SF, Rexhaj E, Hutter D, Faita F, Salmon CS, Villena M, Sicari R, Picano E, Allemann Y, Scherrer U, Sartori C. Exercise induces rapid interstitial lung water accumulation in patients with chronic mountain sickness. Chest. 2012 Apr;141(4):953-958. doi: 10.1378/chest.11-0084. Epub 2011 Sep 1.
Rimoldi SF, Rexhaj E, Pratali L, Bailey DM, Hutter D, Faita F, Salinas Salmon C, Villena M, Nicod P, Allemann Y, Scherrer U, Sartori C. Systemic vascular dysfunction in patients with chronic mountain sickness. Chest. 2012 Jan;141(1):139-146. doi: 10.1378/chest.11-0342. Epub 2011 Jun 23.
Other Identifiers
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CMS
Identifier Type: -
Identifier Source: org_study_id
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