Responsiveness of Exercise Tests in Pulmonary Arterial Hypertension (RESPONS)
Reproducibility and Responsiveness of Exercise Tests in Pulmonary Arterial Hypertension
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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Quebec
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Québec, Quebec, Canada, G1V 4G5
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec (CRIUCPQ)
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- WHO functional class II or III
- Idiopathic PAH, familial PAH, or associated PAH due to connective tissue disease patients
- Mean pulmonary artery pressure ≥25 mmHg at rest
- Pulmonary capillary wedge pressure ≤15 mmHg
Exclusion Criteria:
- Prior use of phosphodiesterase type-5 inhibitors
- Unstable clinical condition over the last 4 months
- Recent syncope
- WHO functional class IV
- Left ventricular ejection fraction <40%
- Restrictive or obstructive lung disease
- Intrinsic musculoskeletal abnormality precluding exercise testing
- Patients with a pacemaker
- Treatment with systemic corticosteroids
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: Randomiseret
- Interventionel model: Crossover opgave
- Maskning: Firedobbelt
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
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Eksperimentel: Sildenalfil
Patients will be assigned to sildenafil (20 mg tid) or placebo per os for 28 days in a randomized, double-blind manner.
After a four-week wash-out period, patients will then be crossed over to the alternate therapy for the next 28 days.
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Sildenafil citrate is a phosphodiesterase type-5 inhibitor.
Patients will be assigned to sildenafil (20 mg tid) or placebo per os for 28 days in a randomized, double-blind manner.
After a four-week wash-out period, patients will then be crossed over to the alternate therapy for the next 28 days.
Andre navne:
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Placebo komparator: Sugar Pill
Patients will be assigned to sildenafil (20 mg tid) or placebo per os for 28 days in a randomized, double-blind manner.
After a four-week wash-out period, patients will then be crossed over to the alternate therapy for the next 28 days.
|
Patients will be assigned to sildenafil (20 mg tid) or placebo per os for 28 days in a randomized, double-blind manner.
After a four-week wash-out period, patients will then be crossed over to the alternate therapy for the next 28 days.
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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To compare the reproducibility and the responsiveness of the 6MWT, the endurance shuttle walk test (ESWT) and the cycle endurance test (CET) following pharmacological therapy in PAH.
Tidsramme: 3 months
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After completing the 6MWT, the ESWT and the CET in a randomized order, patients will then be randomized to sildenafil (20mg tid) or placebo in a double-blind manner for 28 days.
The three exercise tests will then be repeated.
After a four-week of wash-out period, patients will repeat the three exercise test and then be crossed over to the alternate therapy for the next 28 days.
The same experiments will be repeated after this period.
The reproducibility of each exercise test will be assessed following placebo.
The responsiveness of each exercise test will be assessed following sildenafil.
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3 months
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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To assess the efficacy of a combination therapy in pulmonary arterial hypertension (PAH).
Tidsramme: 1 month
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Sildenafil will be added to the baseline therapy for one month (20mg tid).
The efficacy of this combined therapy will be assessed by three different exercise tests and by a quality of life questionnaire.
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1 month
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To measure the physiological parameters induced by five different exercise tests in pulmonary arterial hypertension (PAH)
Tidsramme: 2 weeks
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Within one week, PAH patients will performed five different exercise tests.
During each test, a portable telemetric system (Oxycon, Jaegger, Germany) will be used to assess the respiratory cardiovascular adaptations.
Symptoms of leg fatigue and dyspnea will be assessed using the Borg scale.
Quadriceps fatigability will be assessed by volitional and non-volitional (twitch force, TWq) measurements of the quadriceps strength before and immediately after each test (Magstim Co. Ltd., Whitland, Dyfed, Wales, UK).
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2 weeks
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Steeve Provencher, MD, M.Sc., Laval University
Datoer for undersøgelser
Studer store datoer
Studiestart
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Hjerte-kar-sygdomme
- Karsygdomme
- Luftvejssygdomme
- Lungesygdomme
- Hypertension, lunge
- Forhøjet blodtryk
- Pulmonal arteriel hypertension
- Familiær primær pulmonal hypertension
- Molekylære mekanismer for farmakologisk virkning
- Vasodilatorer
- Urologiske midler
- Enzymhæmmere
- Fosfodiesterasehæmmere
- Fosfodiesterase 5-hæmmere
- Sildenafil Citrat
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- RESPONS PAH
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