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Heart risks from breast cancer radiation under the microscope in landmark study

NCT ID NCT02541435

Knowledge-focused Sponsor: St. Olavs Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This study follows 1600 breast cancer patients for up to 15 years to see if modern, lower-dose radiotherapy causes fewer heart problems than older methods. Researchers will use heart scans, blood tests, and ECGs to detect early signs of damage. The goal is to compare heart disease rates in these patients to the general female population and identify which radiation techniques are safest.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
radiotherapy (conventional and laser-assisted breath-controlled)
What this could lead to
If successful, this study could help doctors understand which radiotherapy techniques are safest for the heart, potentially reducing long-term cardiovascular risks for future breast cancer patients.
What could go wrong
This is an observational study, not a treatment trial. It will take 15 years to complete, and results may not apply to all patients or newer radiotherapy methods.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 1,600 people

The number the study aims to enrol. It can still change while the study runs.

Started

Nov 2016

Expected to finish

Dec 2036

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

women treated for breast cancer with radiotherapy

Ages

30 to 70 years

Sex

Female participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * diagnosis of breast cancer * expected life-expectancy above 10 years Exclusion Criteria: * Not willing to participate

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm cardiovascular disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Breast neoplasms Cardiovascular diseases

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • St Olavs University Hospital

    RECRUITING

    Trondheim, Norway

  • Ålesund Hospital

    RECRUITING

    Ålesund, Norway

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