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Discontinuation Versus Continuation of Riociguat Monotherapy in Chronic Thromboembolic Pulmonary Hypertension Successfully Treated With Balloon Pulmonary Angioplasty (DIRECTION)

2026년 6월 8일 업데이트: Assistance Publique - Hôpitaux de Paris
Chronic thromboembolic pulmonary hypertension (CTEPH) is a rare but severe complication of acute pulmonary embolism, characterized by persistent obstruction of the pulmonary arteries by organized thrombi and secondary microvasculopathy. International guidelines recommend a multimodal approach combining pulmonary endarterectomy (PEA), balloon pulmonary angioplasty (BPA), and medical treatment with riociguat, to address the full spectrum of CTEPH lesions. BPA and riociguat are recommended for symptomatic patients with inoperable CTEPH or persistent pulmonary hypertension after PEA. Riociguat is administered before BPA to reduce periprocedural complications by improving pulmonary hemodynamics. While this pre-BPA strategy is well established, post-BPA management is poorly studied, especially in patients achieving therapeutic goals, defined as WHO functional class I or II and near-normal resting pulmonary hemodynamics (70 to 80% of cases). In such cases, riociguat monotherapy is often continued long-term, despite its cost, burden, and potential side effects, which may negatively impact patients' quality of life. Retrospective single-center studies suggest that discontinuation of medical treatment does not lead to significant clinical deterioration. Therefore, we propose conducting a multicenter trial using a PROBE (prospective, randomized, open-label, blinded endpoint) design and a Bayesian approach to test if stopping riociguat monotherapy after successful BPA is associated with an acceptably low risk of clinical worsening over a follow-up period of at least one year compared to continuation. The trial will also assess the cost-effectiveness of riociguat discontinuation.

연구 개요

상태

아직 모집하지 않음

정황

연구 유형

중재적

등록 (추정된)

150

단계

  • 3단계

연락처 및 위치

이 섹션에서는 연구를 수행하는 사람들의 연락처 정보와 이 연구가 수행되는 장소에 대한 정보를 제공합니다.

연구 연락처

연구 장소

      • Angers, 프랑스, 49000
      • Bordeaux, 프랑스, 33600
      • Brest, 프랑스, 29200
      • Caen, 프랑스, 14034
        • CHU Caen
        • 연락하다:
      • Clermont-Ferrand, 프랑스, 63000
      • Dijon, 프랑스, 21000
      • Grenoble, 프랑스, 38700
      • Le Kremlin-Bicêtre, 프랑스, 94270
        • Hôpital Bicêtre
        • 연락하다:
      • Lille, 프랑스, 59037
      • Marseille, 프랑스, 13005
      • Marseille, 프랑스, 13915
        • Hôpital Nord
        • 연락하다:
      • Montpellier, 프랑스, 34295
      • Nantes, 프랑스, 44800
      • Paris, 프랑스, 75015
        • Hôpital Européen Georges Pompidou
        • 연락하다:
      • Poitiers, 프랑스, 86000
      • Rennes, 프랑스, 35000
      • Rouen, 프랑스, 76031
      • Saint-Etienne, 프랑스, 42270
      • Strasbourg, 프랑스, 67091
      • Toulouse, 프랑스, 31059
      • Tours, 프랑스, 37044
        • Hôpital Bretonneau
        • 연락하다:
      • Vandœuvre-lès-Nancy, 프랑스, 54500

참여기준

연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.

자격 기준

공부할 수 있는 나이

  • 성인
  • 고령자

건강한 자원 봉사자를 받아들입니다

아니

설명

Inclusion Criteria:

  • 1. Signed informed consent and willingness to accept either discontinuation or continuation of riociguat monotherapy
  • 2. Age ≥18 years
  • 3. Diagnosis of inoperable CTEPH or persistent PH after PEA, with achievement of therapeutic goals following BPA, defined as:

    1. WHO FC I or II
    2. Pulmonary vascular resistance (PVR) < 3 Wood units
    3. Mean pulmonary artery pressure (mPAP) < 30 mmHg
  • 4. Treatment with riociguat monotherapy for ≥6 months, with stable dose for ≥3 months prior to enrollment
  • 5. Last BPA session performed ≥6 months prior to enrollment
  • 6. 6-minute walk distance (6MWD) ≥ 150 meters
  • 7. For women of childbearing potential: highly effective contraception

Exclusion Criteria:

  • 1. Background treatment with any PH-targeted therapy other than riociguat, (e.g., any endothelin receptor antagonist (ERA), phosphodiesterase-5 inhibitor (PDE-5i), parenteral prostanoids, prostacyclin receptor agonist)
  • 2. Post-capillary pulmonary hypertension, defined as pulmonary artery wedge pressure (PAWP) > 15 mmHg
  • 3. Significant obstructive or restrictive lung disease, defined as:
  • FEV₁ < 60% predicted, with FEV₁/FVC < 65%
  • and/or total lung capacity (TLC) < 60% predicted
  • or known significant chronic lung disease on imaging (e.g., interstitial lung disease, emphysema)
  • 4. Severe hepatic impairment, defined as:
  • Child-Pugh class B or C
  • and/or liver aminotransferase levels > 3× upper limit of normal (ULN)
  • 5. Severe renal impairment (estimated creatinine clearance ≤ 30 mL/min/1.73 m²).
  • 6. Left heart failure with left ventricular ejection fraction (LVEF) < 40%
  • 7. Ongoing or planned treatment with organic nitrates.
  • 8. Concomitant treatment with strong cytochrome P450 3A4 (CYP3A4) inducers (e.g., rifabutin, rifampicin, carbamazepine, phenobarbital, phenytoin, St. John's wort)
  • 9. Concomitant treatment with strong multi pathway P-glycoprotein (P-gp)/ breast cancer resistance protein (BCRP) inhibitors (e.g., lopinavir/ritonavir).
  • 10. Treatment with a strong CYP3A4 inhibitor (e.g., ketoconazole, itraconazole, voriconazole, clarithromycin, telithromycin, nefazodone, ritonavir, and saquinavir) or a moderate dual CYP3A4/CYP2C9 inhibitor (e.g., fluconazole, amiodarone) or co-administration of a combination of moderate CYP3A4 and moderate CYP2C9 inhibitors.
  • 11. History of life-threatening hemoptysis (>100 mL within 24 hours) or prior bronchial artery embolization for hemoptysis
  • 12. Pregnancy, breastfeeding, or intention to become pregnant during the study period
  • 13. Severe comorbidities or underlying conditions with an anticipated life expectancy < 12 months, including active malignancy with localized or metastatic disease
  • 14. Lack of coverage by national health or social security systems
  • 15. Alcohol abuse, as determined by the investigator
  • 16. Any condition or factor likely to interfere with protocol compliance, in the opinion of the investigator
  • 17. Patient under guardianship or curatorship
  • 18. Participation in another interventional trial or being in the exclusion period following a previous research involving the human person

공부 계획

이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.

연구는 어떻게 설계됩니까?

디자인 세부사항

  • 주 목적: 치료
  • 할당: 무작위
  • 중재 모델: 병렬 할당
  • 마스킹: 없음(오픈 라벨)

무기와 개입

참가자 그룹 / 팔
개입 / 치료
실험적: Experimental group
Discontinuation of riociguat
Discontinuation of riociguat after randomization
간섭 없음: Control group
Continuation of riociguat

연구는 무엇을 측정합니까?

주요 결과 측정

결과 측정
측정값 설명
기간
To evaluate whether the discontinuation of riociguat monotherapy after successful BPA in CTEPH patients is associated with an acceptably low risk of clinical worsening compared to continuation
기간: At the longest follow-up, minimum 12 months

Clinical worsening which is the composite of :

  • death due to any cause,
  • hospitalisation due to worsening including : a) documented right heart failure, b) need for lung transplantation, c) need for intraveinous diuretics/inotropic support or d) need for parental prostanoids
  • decline in 6 minutes walk distance by 15% from baseline, combined with WHO functional class III or IV
At the longest follow-up, minimum 12 months

2차 결과 측정

결과 측정
측정값 설명
기간
To compare the effect of discontinuation versus continuation of riociguat monotherapy on 6-minute walk distance (6MWD)
기간: Month 3, 6, 12 and every 6 months with maximum of 48 months
Change from baseline in 6-minute walk distance (6MWD)
Month 3, 6, 12 and every 6 months with maximum of 48 months
To compare the effect of discontinuation versus continuation of riociguat monotherapy on WHO functionnal class
기간: Month 3, 6, 12 and every 6 months with maximum of 48 months
Change from baseline in WHO functionnal class
Month 3, 6, 12 and every 6 months with maximum of 48 months
To compare the effect of discontinuation versus continuation of riociguat monotherapy on WHO functionnal class
기간: Month 3, 6, 12 and every 6 months with maximum of 48 months
Change from baseline in Borg dyspnea
Month 3, 6, 12 and every 6 months with maximum of 48 months
To compare the effect of discontinuation versus continuation of riociguat monotherapy on other clinical measures of pulmonary hypertension
기간: Month 3, 6, 12 and every 6 months with maximum of 48 months
Change from baseline in N-terminal pro-brain natriuretic peptide (NT-proBNP) levels
Month 3, 6, 12 and every 6 months with maximum of 48 months
To compare the effect of discontinuation versus continuation of riociguat monotherapy on pulmonary vascular resistance (PVR)
기간: Month 12
Change from baseline in Pulmonary vascular resistance (PVR)
Month 12
To compare the effect of discontinuation versus continuation of riociguat monotherapy on hemodynamic parameters :
기간: Month 12
Change from baseline in Right atrial pressure
Month 12
To compare the effect of discontinuation versus continuation of riociguat monotherapy on hemodynamic parameters
기간: Month 12
Change from baseline in Mean pulmonary arterial pressure (mPAP)
Month 12
To compare the effect of discontinuation versus continuation of riociguat monotherapy on hemodynamic parameters
기간: Month 12
Change from baseline in Cardiac output
Month 12
To compare the effect of discontinuation versus continuation of riociguat monotherapy on quality of life
기간: Month 3, 6, 12 and every 6 months with maximum of 48 months
Change from baseline in EQ-5D-5L questionnaire
Month 3, 6, 12 and every 6 months with maximum of 48 months
To compare the effect of discontinuation versus continuation of riociguat monotherapy on quality of life
기간: Month 3, 6, 12 and every 6 months with maximum of 48 months
Change from baseline in EmPHasis-10 questionnaire
Month 3, 6, 12 and every 6 months with maximum of 48 months
To assess the health economic impact of riociguat discontinuation
기간: At the longest follow-up, minimum 12 months
Incremental cost-effectiveness ratio (ICER), defined as the difference in in quality-adjusted life years (QALYS), for the strategy of riociguat monotherapy discontinuation from the perspective of the French public health system
At the longest follow-up, minimum 12 months
To assess treatment burden
기간: Month 12
Change from baseline in Treatment burden questionnaire
Month 12

공동 작업자 및 조사자

여기에서 이 연구와 관련된 사람과 조직을 찾을 수 있습니다.

연구 기록 날짜

이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.

연구 주요 날짜

연구 시작 (추정된)

2026년 10월 1일

기본 완료 (추정된)

2031년 1월 31일

연구 완료 (추정된)

2031년 1월 31일

연구 등록 날짜

최초 제출

2026년 6월 1일

QC 기준을 충족하는 최초 제출

2026년 6월 8일

처음 게시됨 (실제)

2026년 6월 12일

연구 기록 업데이트

마지막 업데이트 게시됨 (실제)

2026년 6월 12일

QC 기준을 충족하는 마지막 업데이트 제출

2026년 6월 8일

마지막으로 확인됨

2026년 6월 1일

추가 정보

이 연구와 관련된 용어

기타 연구 ID 번호

  • APHP251608

약물 및 장치 정보, 연구 문서

미국 FDA 규제 의약품 연구

아니

미국 FDA 규제 기기 제품 연구

아니

이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .

CTEPH에 대한 임상 시험

Discontinuation of riociguat에 대한 임상 시험

구독하다