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Clinical trial No longer in our active list Interventional Ages 40 to 70

Comparing breathing exercises for heart failure patients

Official title: Therapeutic Effects of CardioBreath Aplication Versus Inspiratory Muscle Training (IMT) on Vagal Cardiac Modulation, Pulse Wave Velocity Maximal Respiratory Pressures in Heart Failure Patients: Cross-over Randomized Control Trial

Run by Instituto de Cardiologia do Rio Grande do Sul · NCT06139653 · Data updated 2026-05-14

This study is no longer in our active list. It may have stopped recruiting or finished. The details below are as of 2026-05-14 and are kept for reference. Check ClinicalTrials.gov for its current status, or see similar studies below.

This study is testing a new breathing app called CardioBreath to see if it helps heart failure patients breathe better compared to traditional breathing exercises.

Quick facts

Study typeInterventional
Ages40 Years to 70 Years
SexAll
Enrollment40 (estimated)
SponsorInstituto de Cardiologia do Rio Grande do Sul
Academic / other
Locations1 site (Porto Alegre, Rio Grande Do Sul)
Trial IDNCT06139653 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 40 to 70 with reduced ejection fraction heart failure who have access to a mobile device.

Probably not a fit

Patients with active smoking habits, a BMI under 30, sleep apnea, congenital heart failure, or valve disease may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study evaluates the effectiveness of a new breathing app, CardioBreath, against traditional Inspiratory Muscle Training (IMT) in patients with congestive heart failure (CHF). It focuses on the impact of these breathing techniques on respiratory muscle strength, cardiac vagal modulation, arterial stiffness, and diaphragm thickness. The study will recruit post-discharge CHF patients and utilize a crossover randomized control design to compare the two interventions. Participants will be monitored using advanced cardiovascular assessment tools to measure various health outcomes.

Why it matters

Potential benefit: If successful, this study could provide a novel, accessible method for improving respiratory and cardiovascular health in heart failure patients.

How similar studies have gone: Previous studies have shown positive outcomes with breathing exercises in heart failure management, suggesting potential success for this approach.

Who can join: the full rules

Show full inclusion / exclusion criteria 
Inclusion Criteria:

* Consecutive CHF patients in treatment at the outpatient clinic (Institute of Cardiology)
* Of both sexes
* Aged between 40 and 70 years
* And ejection fraction (EF) reduced (\<40%)
* Who have access to a mobile device with access to Internet.

Exclusion Criteria:

* active smoking
* BMI \<30
* Diagnosis of sleep apnea
* Heart failure of congenital origin
* Valve disease.

Where it's running

  • Cardiology Institute of Rio Grande do Sul
    Porto Alegre, Rio Grande Do Sul, Brazil     Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
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Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.