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NCT03563417Recruiting

ISCHEMIA-CTO Trial - Revascularisation or Optimal Medical Therapy of CTO

International Randomized Trial on the Effect of Revascularization or Optimal Medical Therapy of Chronic Total Coronary Occlusions With Myocardial Ischemia - ISCHEMIA-CTO Trial

Source: ClinicalTrials.gov · Last updated 2 Jan 2026

Brief summary (registry, in English)

Study design Prospective randomized open labeled multicenter study Hypotheses 1. In asymptomatic patients with ≥ 10% of myocardial ischemia: PCI (Percutaneous Coronary Intervention) with latest generation of drug eluting stents is superior to optimal medical therapy in terms of relative reduction in MACCE (Major Adverse Cardiovascular and Cerebrovascular events). 2. In symptomatic patients with ≥ 5% of myocardial ischemia: PCI with latest generation of drug eluting stents is superior to optimal medical therapy (OMT) in terms of improved life quality measured as an increase of SAQ (Self Assessment Questionnaire) score of 8 points after 6 months. Inclusion Criteria * CTO in native coronary artery * Myocardial ischemia in a territory supplied by CTO assessed by nuclear imaging. * Age ≥18 yrs. * Able to provide written Informed consent and willing to comply with the specified follow-up contacts * Target artery ≥ 2.5 mm Prior to randomization all patients undergo 3 months of OMT. Subsequently the population will be divided into: Cohort A: Asymptomatic (CCS \< 2 and SAQ QoL \> 60) patients with myocardial ischemia (≥ 10% of LV) in a territory supplied by CTO Cohort B: Symptomatic patients (CCS class ≥ 2 and/or SAQ QoL score ≤ 60 after treating non CTO lesions and after OMT) with Myocardial ischemia (5% of LV) in a territory supplied a CTO Cohort C: patients enrolled but not randomized in cohort A or B Exclusion criteria (for both cohort A and B) * NSTEMI or STEMI within 1 month * Coronary anatomy not suitable for CTO-procedure * Coronary artery disease involving the left main/three-vessel disease with indication for CABG following heart team conference * Life expectancy \< 2 years * Severe chronic pulmonary disease (FEV1 \< 30 % of predicted value) * Contraindication to dual anti-platelet therapy * Pregnancy * eGFR \< 30 mL/min/1.73 m2 * In multi-vessel disease: if it is deemed unsafe to treat the non-CTO lesion first. * Severe valvular heart disease Primary endpoint Cohort A: Composite endpoint of MACCE (all-cause mortality, stroke, any myocardial infarction, clinically driven revascularization\*), hospitalization for heart failure or incidence of malignant arrhythmias. \*CCS class ≥ 2 and/or QoL score \< 60. Same criteria used as for allocation to Cohort B Cohort B: SAQ Quality of Life Assessment after 6 months. Number of patients 1,560 (1200 in cohort A/360 in cohort B Follow up time Cohort A: 5 years Cohort B: 6 months

Status (registry)
Recruiting
Study type
Interventional
Enrollment
1560 (estimated)
First submitted
10 Jun 2018
Start date
6 Nov 2018
Primary completion date
1 Nov 2028
Lead sponsor
Aarhus University Hospital Skejby
NCT number
NCT03563417

What you commit to

  • Study type: Interventional
  • Planned participants: 1560
  • From 6 Nov 2018 to the primary completion date, 1 Nov 2028
  • 27 sites in 7 countries
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Other illness

  • Coronary disease involving the left main/three vessel disease with indication for CABG following heart team conference.
  • Severe chronic pulmonary disease (FEV1 \< 30 % of predicted value)
  • In multi-vessel disease: if it is deemed unsafe to treat the non-CTO lesion first.
  • Severe valvular heart disease

Lab values

  • Contraindication to dual anti-platelet therapy
  • eGFR \< 30 mL/min/1.73 m2

Age

  • Life expectancy \< 2 years

Other

  • NSTEMI or STEMI within 1 month
  • Coronary anatomy not suitable for CTO-procedure
  • Pregnancy

Who the study is looking for

  • CTO in native coronary artery
  • Myocardial ischemia in a territory supplied by CTO assessed by nuclear imaging.
  • Age ≥18 yrs.
  • Able to provide written informed consent and willing to comply with the specified follow-up contacts.
  • Target artery ≥ 2.5 mm
    • Prior to randomization all patients undergo 3 months of OMT. Subsequently the population will be divided into:
    • Cohort A: Asymptomatic (CCS \< 2 and SAQ QoL \> 60) patients with myocardial ischemia (≥ 10% of LV) in a territory supplied by CTO
    • Cohort B: Symptomatic patients (CCS class ≥ 2 and/or SAQ QoL score ≤ 60 after treating non CTO lesions and after OMT) with Myocardial ischemia (5% of LV) in a territory supplied a CTO assess by nuclear imaging.
    • Cohort C: Screening population not eligible for randomization in cohort A or B

Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (27)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
Aarhus University Hospital
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Aarhus NDenmarkRecruiting
Rigshospitalet
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CopenhagenDenmarkRecruiting
Gentofte Hospital
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HellerupDenmarkRecruiting
Odense University Hospital
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OdenseDenmarkRecruiting
Zealand University Hospital
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RoskildeDenmarkRecruiting
North Estonia Medical Centre
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TallinnEstoniaRecruiting
Hospital Germans Trias i Pujol
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BadalonaSpainActive, not recruiting
Hospital Vall de Hebron
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BarcelonaSpainActive, not recruiting
Hospital Clinic
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BarcelonaSpainRecruiting
Hospital De Bellvitge
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BarcelonaSpainActive, not recruiting
Hospital Galdakao
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GaldakaoSpainRecruiting
Hospital La Paz
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MadridSpainActive, not recruiting
Hospital Universitario Clínico San Carlos
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MadridSpainRecruiting
Hospital Universitari de Tarragona Joan XXIII
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TarragonaSpainRecruiting
Helsinki University Central Hospital
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HelsinkiFinlandActive, not recruiting
Kuopio University Hospital
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KuopioFinlandActive, not recruiting
Heart Hospital Tampere
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TampereFinlandRecruiting
Turku University Hospital
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TurkuFinlandRecruiting
Clinique Louis Pasteur
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Essey-lès-NancyFranceActive, not recruiting
Cardiovascular Institute, Groupe Hospitalier Mutualiste
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GrenobleFranceRecruiting
Belfast Health and Social Care Trust, Department of Cardiology
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BelfastUnited KingdomActive, not recruiting
University Hospital Bristol
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BristolUnited KingdomActive, not recruiting
Barts Health NHS
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LondonUnited KingdomActive, not recruiting
St. George's University Hospital
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LondonUnited KingdomActive, not recruiting
Sahlgrenska University Hospital
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GothenburgSwedenRecruiting
Skaane University Hospital (Lund)
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LundSwedenActive, not recruiting
Stockholm South Central Hospital (Södersjukhuset)
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StockholmSwedenActive, not recruiting

This page is information, not medical advice. Discuss any trial with your doctor.