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Atrial High Rate EpisodesPhase 3NOAHNCT02618577

Non-vitamin K Antagonist Oral Anticoagulants in Patients With Atrial High Rate Episodes

A Phase 3 study testing Edoxaban and ASA in people with Atrial High Rate Episodes, run by Atrial Fibrillation Network at 18 sites in 18 countries.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

NOAH is an investigator-initiated, prospective, parallel-group, double-blind, randomised, multi-centre trial. The objective of the trial is to demonstrate that oral anticoagulation using the NOAC edoxaban is superior to current therapy to pre-vent stroke, systemic embolism, or cardiovascular death in patients with… Read more about this study

Who is it for?
Ages 65 years and older
Conditions the study is for
Atrial High Rate Episodes
What is being tested?
Edoxaban and ASA
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
2,608 participants
Where
18 sitesin 18 countries
Study dates
Feb 2016to 31 Dec 2022
Phase
Phase 3
Are there results?
Yes, posted in the registrySummary in the doctors' view

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 65 years and older
  • All sexes
  • No healthy volunteers
  • Older adult

Who may be able to join

  • Pacemaker, defibrillator or insertable cardiac monitor implanted for any reason with feature of detection of AHRE, implanted at least 2 months prior to randomisation
  • AHRE detection feature activated for adequate detection of AHRE (refer to Appendix XIII)
  • AHRE (≥ 170 bpm atrial rate and ≥ 6 min duration) documented by the implanted device via its atrial lead and stored digitally. Any AHRE episode recorded is potentially eligible, but AHRE episodes detected in the first 2 months after implantation of a new device involving placement or repositioning of atrial electrodes are not eligible. AHRE episodes recorded in the first two months after a simple "box change" operation, i.e. exchange of a pacemaker or defibrillator device without exchange or repositioning of atrial electrodes, are eligible
  • Provision of signed informed consent
  • Age ≥ 65 years
  • In addition, at least one of the following cardiovascular conditions leading to a modified CHA2DS2VASc score of 2 or more:
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  • Age ≥ 75 years
  • Heart failure (clinically overt or LVEF < 45%)
  • Arterial hypertension (chronic treatment for hypertension, estimated need for continuous antihyper-tensive therapy or resting blood pressure > 145/90 mmHg)
  • Diabetes mellitus
  • Prior stroke or transient ischemic attack (TIA)
  • Vascular disease (previous myocardial infarction, peripheral, carotid/cerebral, or aortic plaques on transesophageal echocardiogram [TEE])
  • Provision of signed informed consent

Who cannot join

  • Any disease that limits life expectancy to less than 1 year
  • Participation in another controlled clinical trial, either within the past two months or still ongoing
  • Previous participation in the present trial NOAH - AFNET 6
  • Drug abuse or clinically manifest alcohol abuse
  • Any history of overt AF or atrial flutter
  • Indication for oral anticoagulation (e.g. deep venous thrombosis)
Show all 12Show fewer
  • Contraindication for oral anticoagulation in general
  • Contraindication for edoxaban as stated in the current SmPC
  • Indication for long-term antiplatelet therapy other than acetylsalicylic acid or a need for treatment with any antiplatelet agent in addition to edoxaban, especially dual antiplatelet therapy (DAPT). Patients with a transient requirement for DAPT (e.g. after receiving a stent) will be eligible when the need for DAPT is no longer present
  • Acute coronary syndrome, coronary revascularisation (PCI or bypass surgery), or overt stroke within 30 days prior to randomisation
  • End stage renal disease (creatinine clearance (CrCl) < 15 ml/min as calculated by the Cockcroft-Gault method)
  • All persons exempt from participation in a clinical trial by law

Trial locations and contacts

18 sites in 18 countries.

18 sites in 18 countries

Austria1 site
  • Several Sites

    Multiple Locations

Other trials in Austria

Belgium1 site
  • Several Sites

    Multiple Locations

Other trials in Belgium

Bulgaria1 site
  • Several

    Multiple Locations

Other trials in Bulgaria

Czechia1 site
  • Several

    Multiple Locations

Other trials in Czechia

Denmark1 site
  • Several

    Multiple Locations

Other trials in Denmark

France1 site
  • Several

    Multiple Locations

Other trials in France

Germany1 site
  • Several Sites

    Multiple Locations

Other trials in Germany

Greece1 site
  • Several

    Multiple Locations

Other trials in Greece

Hungary1 site
  • Several

    Multiple Locations

Other trials in Hungary

Italy1 site
  • Several

    Multiple Locations

Other trials in Italy

Netherlands1 site
  • Several

    Multiple Locations

Other trials in Netherlands

Poland1 site
  • Several

    Multiple Locations

Other trials in Poland

Portugal1 site
  • Several

    Multiple Locations

Other trials in Portugal

Romania1 site
  • Several

    Multiple Locations

Other trials in Romania

Spain1 site
  • Several

    Multiple Locations

Other trials in Spain

Sweden1 site
  • Several

    Multiple Locations

Other trials in Sweden

Ukraine1 site
  • Several

    Multiple Locations

Other trials in Ukraine

United Kingdom1 site
  • Several

    Multiple Locations

Other trials in United Kingdom

About this study

Official title: Non-vitamin K Antagonist Oral Anticoagulants in Patients With Atrial High Rate Episodes - An Investigator-driven, Prospective, Randomised, Double-blind, Multi-centre Trial Initiated by the European Society of Cardiology and AFNET

NOAH is an investigator-initiated, prospective, parallel-group, double-blind, randomised, multi-centre trial. The objective of the trial is to demonstrate that oral anticoagulation using the NOAC edoxaban is superior to current therapy to pre-vent stroke, systemic embolism, or cardiovascular death in patients with AHRE and at least two stroke risk factors but without AF. The trial will be conducted in several European countries.

Read the detailed description

Atrial fibrillation (AF) is a common cause of stroke, especially ischemic stroke. So far, all available data that demonstrate a beneficial effect of oral anticoagulation for stroke prevention have been collected in populations with AF documented by conventional ECG recordings. It is well established that a large proportion of AF episodes remain undiagnosed ("silent AF"), and many of these patients present with a stroke as the first clinical sign of AF. Earlier initiation of anticoagulation could prevent such events. Continuous monitoring of atrial rhythm by implanted devices could close this diagnostic gap. Pacemakers, defibrillators, and cardiac resynchronisation devices already provide automated algorithms alerting to the occurrence of highly organised atrial tachyarrhythmia episodes, also called "subclinical atrial fibrillation" or, more commonly, "atrial high rate episodes" (AHRE). Data from large prospectively followed patient cohorts demonstrated that stroke rate is increased in patients with AHRE. A sizeable portion of these patients develops clinically detected AF over time. In these patients, AHRE can be considered as an early manifestation of paroxysmal AF. A few AHRE patients do not develop clinically overt AF, and the absolute stroke rates are lower in patients with AHRE when compared to stroke rates in patients with clinically diagnosed AF. In light of the bleeding complications associated with oral anticoagulant therapy, there is thus uncertainty about the optimal antithrombotic therapy in patients with AHREs.

The Non-vitamin K antagonist Oral anticoagulants (NOACs) provide similar or slightly better stroke prevention, and appear slightly safer compared to vitamin K antagonists (VKAs). In addition, no individual therapy adjustment of NOACs has to be performed. Edoxaban, a newly introduced NOAC, at a dose regime of 60 mg once daily (OD) has a favourable profile compared to dose-adjusted VKA therapy: In the ENGAGE-TIMI 48 trial, edoxaban prevented strokes at least as effectively as VKA therapy but caused less major bleeding events than VKA therapy.

Being tested
Edoxaban, ASA
Keywords
Anticoagulation, Atrial High Rate Episodes, Atrial Fibrillation, VKA, NOAC
Medical subject headings
Atrial Fibrillation

What participants receive

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

  • EdoxabanDrug

    Also called Lixiana, Savaysa

    Edoxaban will be applied at the therapeutic dose approved for stroke prevention in non-valvular AF

  • ASADrug

    Also called ASS

    ASA 100 mg tablets or Placebo, based on accepted indication for the latter, including peripheral or coronary artery disease, a prior myocardial infarction, or a prior stroke.

Study groups in NCT02618577
Study groupRoleWhat they receive
EdoxabanExperimentalEdoxaban will be applied in NOAH at the therapeutic dose approved for stroke prevention in non-valvular AF, i.e. 60 mg OD with a reduction of dose to 30 mg OD in patients with one of the following characteristics: Impaired renal function (CrCl 15-50 ml/min), or low body weight (≤60 kg), or patients receiving the glycoprotein-P inhibitors cyclosporin, dronedarone, erythromycin, or ketoconazole.
Receives: Drug: Edoxaban
ASA or PlaceboActive comparatorEither one tablet of ASA 100 mg plus one placebo tablet matching in colour, form and size to edoxaban 60 mg or one placebo tablet matching in colour, weight, form and size to ASA 100 mg plus one placebo tablet matching in colour, form and size to edoxaban 60 mg will be administered per day depending on the indication for use of antiplatelet therapy as assessed by the responsible investigator
Receives: Drug: ASA

What is being measured

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

  1. Composite of Stroke, Systemic Embolism, or Cardiovascular Death

    Time from randomisation to the first occurrence of stroke, systemic embolism, or cardiovascular death; incidence of first occurence of outcome measure.

    Measured: 28 months

Secondary outcomes (10)
  1. Components of the Primary Outcome, Stroke

    Time from randomisation to the first occurrence of ischemic stroke; incidence of first occurence of outcome measure.

    Measured: 28 months

  2. Major Adverse Cardiac Events (MACEs: Cardiac Death, Myocardial Infarction, Acute Coronary Syndrome (ACS)

    PCI, CABG

    Measured: 28 months

  3. All-cause Death

    All-cause death

    Measured: 28 months

  4. Major Bleeding Events

    according to the International Society on Thrombosis and Haemostasis (ISTH) definitions

    Measured: 28 months

  5. Quality of Life Changes at 12 and 24 Months Compared to Baseline

    Adjusted mean change from baseline at 12 and 24 months of Quality of life as assessed by the EuroQol Group 5-Dimension 5-Level questionnaire (EQ-5D-5L): The resulting score of the UK index ranges from 1 (for the best state) to - 0.285 (for the worst state), with 5.1% of the states valued as worse than dead. EQ5D- VAS: visual-analogue scale (0 worst to 100 best).

    Subscales of the UK index score were combined by adding up EQ-5D-5L index values with STATA using the English (ENG) Devlin value set, Version 1.1 (Updated 01/12/2020).

    Karnofsky Performance Scale is an 11-point scale from 0 to 100 (0 worst to 100 best).

    Measured: Baseline, 12 months and 24 months.

  6. Patient Satisfaction at 12 and 24 Months Compared to Baseline

    Adjusted change from baseline at 12 and 24 months measured by the Perception of Anticoagulant Treatment Questionnaire: For convenience score, a 0 - 100 scale; for satisfaction score a 0 - 100 scale; for both scores, the higher the score, the higher the convenience/satisfaction.

    Measured: Baseline, 12 months and 24 months.

  7. Cost Effectiveness and Health Resource Utilisation

    estimated by quantification of relevant events, interventions, nights spent in hospital and cardiovascular therapies

    Measured: 28 months

  8. Autonomy Status

    Autonomy status only in patients with stroke during study participation, assessed at 24 month by modified Rankin scale. (Score ranges from 1 to 8, a higher score indicates a higher grade of disability)

    Measured: Baseline and 24 months

  9. Components of the Primary Outcome, Systemic Embolism

    Time from randomisation to the first occurrence of systemic embolism; incidence of first occurence of outcome measure.

    Measured: 28 months

  10. Components of the Primary Outcome, Cardiovascular Death

    Time from randomisation to the first occurrence of cardiovascular death; incidence of first occurence of outcome measure.

    Measured: 28 months

Timeline

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

  1. First posted1 Dec 2015 (estimated)
  2. Study startFeb 2016
  3. Primary completion31 Dec 2022
  4. Study completion31 Dec 2022

Why it stopped: following a recommendation from the data safety and monitoring board due to safety concerns and a tendency towards futility.

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 3
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Model description
Phase 3b
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
2,608 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT02618577
Sponsor's protocol ID
NOAH - AFNET 6
Other IDs
2015-003997-33, 2015
Acronym
NOAH
Status last verified
Feb 2025
First submitted
27 Nov 2015
Last updated
6 Feb 2025
Data monitoring committee
Yes

Publications

  • Bertaglia E, Blank B, Blomstrom-Lundqvist C, Brandes A, Cabanelas N, Dan GA, Dichtl W, Goette A, de Groot JR, Lubinski A, Marijon E, Merkely B, Mont L, Piorkowski C, Sarkozy A, Sulke N, Vardas P, Velchev V, Wichterle D, Kirchhof P. Atrial high-rate episodes: prevalence, stroke risk, implications for management, and clinical gaps in evidence. Europace. 2019 Oct 1;21(10):1459-1467. doi: 10.1093/europace/euz172.

    PubMed 31377792
  • Kirchhof P, Blank BF, Calvert M, Camm AJ, Chlouverakis G, Diener HC, Goette A, Huening A, Lip GYH, Simantirakis E, Vardas P. Probing oral anticoagulation in patients with atrial high rate episodes: Rationale and design of the Non-vitamin K antagonist Oral anticoagulants in patients with Atrial High rate episodes (NOAH-AFNET 6) trial. Am Heart J. 2017 Aug;190:12-18. doi: 10.1016/j.ahj.2017.04.015. Epub 2017 May 3.

    PubMed 28760205
  • Kirchhof P, Toennis T, Goette A, Camm AJ, Diener HC, Becher N, Bertaglia E, Blomstrom Lundqvist C, Borlich M, Brandes A, Cabanelas N, Calvert M, Chlouverakis G, Dan GA, de Groot JR, Dichtl W, Kravchuk B, Lubinski A, Marijon E, Merkely B, Mont L, Ozga AK, Rajappan K, Sarkozy A, Scherr D, Sznajder R, Velchev V, Wichterle D, Sehner S, Simantirakis E, Lip GYH, Vardas P, Schotten U, Zapf A; NOAH-AFNET 6 Investigators; NOAH-AFNET6 sites and investigators. Anticoagulation with Edoxaban in Patients with Atrial High-Rate Episodes. N Engl J Med. 2023 Sep 28;389(13):1167-1179. doi: 10.1056/NEJMoa2303062. Epub 2023 Aug 25.

    PubMed 37622677

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing Edoxaban and ASA in people with Atrial High Rate Episodes, run by Atrial Fibrillation Network at 18 sites in 18 countries.

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 13 inclusion and 12 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: stopped early, as of the sponsor's last update on 6 Feb 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 18 sites in Austria, Belgium, Bulgaria, Czechia, Denmark and 13 more countries. 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.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 6 Feb 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

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

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Composite of Stroke, Systemic Embolism, or Cardiovascular Death (time frame: 28 months). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT02618577, which also lists 3 linked publications.

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 Feb 2025.

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