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Can slow breathing soothe a failing heart?

NCT ID NCT07763353

Symptom relief Sponsor: Chung Shan Medical University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 13, 2026 · Last updated Aug 14, 2026 · Updated 1 time

Summary

This trial tests whether slow-paced breathing—reducing breaths to 4-7 per minute—can improve heart rate variability, a marker of heart health, in hospitalized heart failure patients. Participants will be randomly assigned to either standard cardiac rehab alone or rehab plus slow-breathing training (20-minute sessions twice daily for 8 weeks). The goal is to see if this simple breathing technique can enhance the body's autonomic balance and potentially improve outcomes.

What this could mean

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

Active substance
Slow-paced breathing training (4-7 breaths per minute, 20-minute sessions twice daily for 8 weeks) combined with standard cardiac rehabilitation
What this could lead to
If effective, slow-paced breathing could become a simple, drug-free addition to cardiac rehab, potentially improving autonomic balance and reducing risks in heart failure patients.
What could go wrong
This is a small early trial (27 participants), and previous studies on slow-paced breathing have shown inconsistent results. The benefits may be modest or not generalizable to all heart failure patients.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 27 people

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

Expected to start

Aug 2026

An estimate. Start dates often move.

Expected to finish

Aug 2027

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.

Ages

20 to 80 years

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: * Patients diagnosed with heart failure during hospitalization and who are clinically stable. Exclusion Criteria: Respiratory distress at rest with the utilization of accessory neck muscles (neck breathing pattern). Presence of an implanted cardiac pacemaker. Chronic pulmonary diseases, such as chronic obstructive pulmonary disease (COPD), pulmonary hypertension, pulmonary fibrosis, or exercise-induced asthma. Current use of mechanical ventilation. Severe aortic stenosis. Aortic dissection. Acute myocarditis, pericarditis, or infective endocarditis. Inability to walk independently due to orthopedic, neurological, or other medical conditions. Inability to understand the study protocols or cooperate, such as individuals with psychiatric disorders, dementia, or a history of stroke.

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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.

Heart failure

How to take part

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  1. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

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