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Apple watch vs. heart failure: can a smartwatch save lives?

NCT ID NCT07447908

Knowledge-focused Sponsor: University Health Network, Toronto 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jul 07, 2026 · Updated 2 times

Summary

This study will see if an Apple Watch can help predict when heart failure gets worse. Researchers will compare data from the watch with standard tests in 360 adults with heart failure. The goal is to find a simpler way to monitor patients and catch problems early.

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 360 people

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

Started

Jun 2026

Expected to finish

Sep 2029

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

Adult (\>18 years of age), ambulatory heart failure patients currently followed by the University Health Network and hospitals in multi-site validation study.

Ages

18 years and older

Sex

Anyone

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: * broad age range (\> 18 years of age) * NT-proBNP \> 400 or 1000 if in AF * Within 3 months post discharge from HF hospitalization/ HF ED visit/ HF rapid clinic visit with intensification of diuretic therapy * NYHA functional class I-IV, heart failure with reduced and preserved ejection fraction * Literacy in English * Patient provided informed consent Exclusion Criteria: * Unable to perform a CPET based on the standard protocol * End stage renal disease requiring dialysis * Living with LVAD * MRP deems patient unfit for the study * Post heart transplant

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Conditions

The condition(s) this trial relates to.

heart failure

As listed by the trial registrant

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

Apple watch Cardiopulmonary exercise test Heart failure Heart failure - nyha ii - iv Heart failure patients

How to take part

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

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The places running it

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

  3. The official record

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

    Open the record ↗

  4. 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

  • 200 Elizabeth Street

    RECRUITING

    Toronto, Ontario, M5G 2C4, Canada

  • Southlake Health

    NOT_YET_RECRUITING

    Newmarket, Ontario, L3Y 2P9, Canada

    Contact Email: •••••@•••••

    Contact Email: •••••@•••••

  • Sunnybrook Health Sciences Center

    NOT_YET_RECRUITING

    Toronto, Ontario, Canada

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