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Coronary Syndrome, AcuteDanRUSHNCT07727135

Rapid or Ultra-rapid Diagnosis of Myocardial Infarction Using High-Sensitivity Cardiac Troponin on Hospital Presentation

A study testing 0/3-hour high-sensitivity cardiac troponin algorithm and 0/1-hour high-sensitivity cardiac troponin algorithm in people with Coronary Syndrome, Acute and Myocardial Infarction, run by Herlev and Gentofte Hospital at 11 sites in Denmark.

Not yet recruiting

Opening soon. The study is approved but enrolment has not started yet. Sites may already take enquiries.

Sites and contacts
Official record
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Trial summary

People with chest pain are often tested for a heart attack using a blood test called high-sensitivity cardiac troponin (hs-cTn). Traditionally, this blood test is repeated 3 hours after the first sample. Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
0/3-hour high-sensitivity cardiac troponin algorithm and 0/1-hour high-sensitivity cardiac troponin algorithm
Could I receive a placebo?
No, everyone receives an active treatment
How many people
28,000 participants
Where
11 sitesDenmark
Study dates
1 Sep 2026to 1 Feb 2029
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Adults (≥18 years) presenting with suspected acute coronary syndrome (ACS) with a clinical indication for high-sensitivity cardiac troponin testing

Who cannot join

  • Age <18 years.
  • ST-segment elevation myocardial infarction (STEMI) identified on the presenting electrocardiogram and requiring immediate reperfusion therapy.

Trial locations and contacts

11 sites in 1 country. Contact the study team or a site near you to ask about taking part.

11 sites in 1 country

Denmark11 sites
  • Aalborg University Hospital

    Aalborg, 9000

  • Bispebjerg & Frederiksberg Hospital

    Bispebjerg, 2400

  • Esbjerg og Grindsted Sygehus

    Esbjerg, 6700

  • Gødstrup Regional Hospital

    Gødstrup, 7400

  • Herlev & Gentofte Hospital

    Herlev, 2730

  • Nordsjællands Hospital

    Hillerød, 3400

  • Amager & Hvidovre Hospital

    Hvidovre, 2650

  • Nykøbing Falster County Hospital

    Nykøbing Falster, 4800

  • Odense University Hospital

    Odense, 5000

  • Svendborg Hospital

    Svendborg, 5700

  • Central Jutland Regional Hospital (Viborg Hospital & Silkeborg Hospital)

    Viborg, 8800

Other trials in Denmark

About this study

Official title: Danish Randomized Trial of Rapid or Ultra-rapid Diagnosis of Myocardial Infarction Using High-Sensitivity Cardiac Troponin on Hospital Presentation

People with chest pain are often tested for a heart attack using a blood test called high-sensitivity cardiac troponin (hs-cTn). Traditionally, this blood test is repeated 3 hours after the first sample. Newer guidelines recommend repeating the test after 1 hour instead, which may allow patients to receive a diagnosis and leave the hospital sooner.

The purpose of the DanRUSH trial is to compare these two strategies: repeating the blood test after 1 hour versus after 3 hours in adults with suspected acute coronary syndrome. The study will evaluate whether the 1-hour strategy is as safe as the 3-hour strategy while reducing the length of hospital stay.

DanRUSH is a nationwide, pragmatic, cluster-randomized trial conducted in emergency- and cardiology departments across Denmark. The results will help determine the best timing for blood testing in patients with suspected heart attack and improve future care for these patients.

Read the detailed description

Each year, approximately 80,000 individuals present to the Danish healthcare system with chest pain. Of these, around 25,000 are admitted to hospital and approximately 8,000 are diagnosed with acute myocardial infarction. High-sensitivity cardiac troponin (hs-cTn) is the cornerstone biomarker for the diagnosis of myocardial infarction and is essential for the rapid rule-in and rule-out of acute coronary syndromes. Because the diagnosis of myocardial infarction relies not only on troponin concentration but also on changes in troponin levels over time, serial blood sampling is required to distinguish acute myocardial injury from chronic elevations.

Advances in hs-cTn assay sensitivity have enabled progressively shorter intervals between serial blood sampling. Traditionally, most emergency departments have used a 0/3-hour algorithm, in which hs-cTn is measured at presentation and again after 3 hours. However, contemporary European guidelines recommend accelerated diagnostic pathways using a 0/1-hour or 0/2-hour algorithm.

The primary purpose of the DanRUSH trial is to determine whether shortening the interval between serial hs-cTn measurements from 3 hours to 1 hour is both safe and effective in adults presenting with suspected acute coronary syndrome.

The primary safety endpoint is defined as the risk of new (missed or recurrent) myocardial infarction or cardiovascular death after dischage from the index hospitalization -of the 0/1-hour algorithm compared with the 0/3-hour algorithm. Efficacy will be assessed as hospital length of stay, defined as the time from presentation to discharge. The study aims to demonstrate that the 0/1-hour algorithm is non-inferior to the 0/3-hour algorithm with respect to safety while improving efficiency through shorter hospital stays.

The study is designed as a nationwide, pragmatic, open-label, stepped-wedge cluster randomized trial. Participating emergency- and cardiology departments in Denmark will sequentially and randomly transition from the conventional 0/3-hour hs-cTn algorithm to the 0/1-hour hs-cTn algorithm until all sites are exposed to the intervention. A study-specific order set in the electronic medical record will ensure the correct timing of serial blood sampling and facilitate identification of study participants. Relevant baseline and outcome information will be obtained from routinely collected data in the electronic medical record and Danish nationwide health registries.

The results of DanRUSH are expected to provide definitive randomized evidence regarding the safety and effectiveness of the 0/1-hour hs-cTn algorithm. If the accelerated diagnostic strategy is shown to be safe, it may support broader implementation and improve patient flow by reducing unnecessary hospital stays. Conversely, if safety cannot be confirmed, the study may prevent widespread adoption of an insufficiently validated diagnostic strategy.

Being tested
0/3-hour high-sensitivity cardiac troponin algorithm, 0/1-hour high-sensitivity cardiac troponin algorithm
Keywords
Myocardial infarction, Troponin, Biomarker, Clinical assessment, Myocardial injury, Coronary syndrome
Medical subject headings
Acute Coronary Syndrome, Myocardial Infarction, Coronary Artery Disease, Cardiovascular Diseases, Angina, Unstable

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • 0/3-hour high-sensitivity cardiac troponin algorithmDiagnostic test

    High-sensitivity cardiac troponin measurements obtained at presentation and 3 hours after the initial sample as part of the conventional diagnostic strategy for suspected acute coronary syndrome.

  • 0/1-hour high-sensitivity cardiac troponin algorithmDiagnostic test

    High-sensitivity cardiac troponin measurements obtained at presentation and 1 hour after the initial sample as part of the accelerated diagnostic strategy for suspected acute coronary syndrome.

Study groups in NCT07727135
Study groupRoleWhat they receive
Conventional 0/3-hour hs-cTn AlgorithmActive comparatorParticipants are managed according to the conventional diagnostic strategy for suspected acute coronary syndrome using a 0/3-hour high-sensitivity cardiac troponin (hs-cTn) algorithm. Blood samples are obtained at presentation and 3 hours later in accordance with local clinical practice and study procedures.
Receives: Diagnostic Test: 0/3-hour high-sensitivity cardiac troponin algorithm
Accelerated 0/1-hour hs-cTn AlgorithmExperimentalParticipants are managed according to the accelerated diagnostic strategy for suspected acute coronary syndrome using a 0/1-hour high-sensitivity cardiac troponin (hs-cTn) algorithm. Blood samples are obtained at presentation and 1 hour later in accordance with local clinical practice and study procedures.
Receives: Diagnostic Test: 0/1-hour high-sensitivity cardiac troponin algorithm

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Safety outcome: New myocardial infarction or cardiovascular death

    The risk of new (missed or recurrent) myocardial infarction or cardiovascular death after dischage -of the 0/1-hour algorithm compared with the 0/3-hour algorithm.

    Measured: From discharge from the index hospitalization until 30 days after discharge.

  2. Efficacy outcome: Length of hospital stay

    Length of stay, defined as the time from presentation to the emergency department until discharge from hospital.

    Measured: During the index hospitalization (from emergency department presentation until hospital discharge)

Secondary outcomes (8)
  1. New myocardial infarction at 12 months

    New myocardial infarction within 12 months following discharge from the index hospitalization, excluding myocardial infarction diagnosed during the index hospitalization.

    Measured: From discharge from the index hospitalization until 12 months after discharge.

  2. All-cause mortality

    Death from any cause following discharge from the index hospitalization

    Measured: 30 days and 12 months following discharge

  3. Overall myocardial infarction rate

    Occurrence of myocardial infarction during follow-up

    Measured: 30 days and 12 months following discharge

  4. Diagnostic coronary angiography

    Performance of diagnostic coronary angiography following the index presentation

    Measured: During the index hospitalization, at 30 days, and at 12 months after the index presentation

  5. Invasive treatment

    Invasive coronary treatment, including percutaneous coronary intervention or coronary artery bypass grafting.

    Measured: During the index hospitalization, at 30 days, and at 12 months after the index presentation

  6. Re-presentation to hospital

    Presentation to the emergency department or hospital following discharge from the index hospitalization

    Measured: 30 days and 12 months following discharge

  7. Re-hospitalization

    Hospital admission following discharge from the index hospitalization

    Measured: 30 days and 12 months following discharge

  8. Time to treatment initiation

    Time from presentation to initiation of relevant treatment for acute coronary syndrome

    Measured: From emergency department presentation until initiation of treatment, assessed during the index hospitalization (up to 7 days)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted27 Jul 2026
  2. Study start1 Sep 2026 (estimated)
  3. Primary completion1 Sep 2028 (estimated)
  4. Study completion1 Feb 2029 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Diagnosis
Allocation
Randomised
Intervention model
Parallel groups
Model description
This study is a nationwide, pragmatic, open-label, stepped-wedge cluster randomized trial. Emergency- and cardiology departments serve as the unit of randomization (clusters). All participating clusters initially apply the control strategy, consisting of a 0/3-hour high-sensitivity cardiac troponin algorithm. Clusters subsequently transition sequentially, in a randomized order, to the intervention strategy, consisting of a 0/1-hour high-sensitivity cardiac troponin algorithm, until all clusters have crossed over to the intervention. Individual participants are exposed to only one of the two diagnostic strategies according to the cluster assignment at the time of presentation.
Masking
None (open label)
Enrolment
28,000 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07727135
Sponsor's protocol ID
DanRUSH
Other IDs
2024-12587-22218
Acronym
DanRUSH
Status last verified
Jul 2026
First submitted
7 Jul 2026
Last updated
6 Aug 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided

Questions about this trial

What is this clinical trial studying?

A study testing 0/3-hour high-sensitivity cardiac troponin algorithm and 0/1-hour high-sensitivity cardiac troponin algorithm in people with Coronary Syndrome, Acute and Myocardial Infarction, run by Herlev and Gentofte Hospital at 11 sites in Denmark.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: opening soon, as of the sponsor's last update on 6 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 11 sites in Denmark. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Majid Afzal, MD (+45 40 29 26 59, raja.majid.ghafoor.afzal@regionh.dk), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Safety outcome: New myocardial infarction or cardiovascular death (time frame: From discharge from the index hospitalization until 30 days after discharge.). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Aug 2026.

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