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
- Diseases
- Coronary artery disease
- 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
Sites (27)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Aarhus University Hospital Coordinator of this site? Confirm its status | Aarhus N | Denmark | Recruiting |
| Rigshospitalet Coordinator of this site? Confirm its status | Copenhagen | Denmark | Recruiting |
| Gentofte Hospital Coordinator of this site? Confirm its status | Hellerup | Denmark | Recruiting |
| Odense University Hospital Coordinator of this site? Confirm its status | Odense | Denmark | Recruiting |
| Zealand University Hospital Coordinator of this site? Confirm its status | Roskilde | Denmark | Recruiting |
| North Estonia Medical Centre Coordinator of this site? Confirm its status | Tallinn | Estonia | Recruiting |
| Hospital Germans Trias i Pujol Coordinator of this site? Confirm its status | Badalona | Spain | Active, not recruiting |
| Hospital Vall de Hebron Coordinator of this site? Confirm its status | Barcelona | Spain | Active, not recruiting |
| Hospital Clinic Coordinator of this site? Confirm its status | Barcelona | Spain | Recruiting |
| Hospital De Bellvitge Coordinator of this site? Confirm its status | Barcelona | Spain | Active, not recruiting |
| Hospital Galdakao Coordinator of this site? Confirm its status | Galdakao | Spain | Recruiting |
| Hospital La Paz Coordinator of this site? Confirm its status | Madrid | Spain | Active, not recruiting |
| Hospital Universitario Clínico San Carlos Coordinator of this site? Confirm its status | Madrid | Spain | Recruiting |
| Hospital Universitari de Tarragona Joan XXIII Coordinator of this site? Confirm its status | Tarragona | Spain | Recruiting |
| Helsinki University Central Hospital Coordinator of this site? Confirm its status | Helsinki | Finland | Active, not recruiting |
| Kuopio University Hospital Coordinator of this site? Confirm its status | Kuopio | Finland | Active, not recruiting |
| Heart Hospital Tampere Coordinator of this site? Confirm its status | Tampere | Finland | Recruiting |
| Turku University Hospital Coordinator of this site? Confirm its status | Turku | Finland | Recruiting |
| Clinique Louis Pasteur Coordinator of this site? Confirm its status | Essey-lès-Nancy | France | Active, not recruiting |
| Cardiovascular Institute, Groupe Hospitalier Mutualiste Coordinator of this site? Confirm its status | Grenoble | France | Recruiting |
| Belfast Health and Social Care Trust, Department of Cardiology Coordinator of this site? Confirm its status | Belfast | United Kingdom | Active, not recruiting |
| University Hospital Bristol Coordinator of this site? Confirm its status | Bristol | United Kingdom | Active, not recruiting |
| Barts Health NHS Coordinator of this site? Confirm its status | London | United Kingdom | Active, not recruiting |
| St. George's University Hospital Coordinator of this site? Confirm its status | London | United Kingdom | Active, not recruiting |
| Sahlgrenska University Hospital Coordinator of this site? Confirm its status | Gothenburg | Sweden | Recruiting |
| Skaane University Hospital (Lund) Coordinator of this site? Confirm its status | Lund | Sweden | Active, not recruiting |
| Stockholm South Central Hospital (Södersjukhuset) Coordinator of this site? Confirm its status | Stockholm | Sweden | Active, not recruiting |
This page is information, not medical advice. Discuss any trial with your doctor.