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Acute Heart Failure (AHF)ReDS-SAFE HF 2NCT07484009

ReDS-guided Decongestion Strategy in Patients Hospitalized for Heart Failure

A study testing Remote Dielectric Sensing System and Blinded ReDS data in people with Acute Heart Failure (AHF) and Heart Failure (for Example, Fluid Overload), run by Fundacion para la Investigacion Biomedica del Hospital Universitario Ramon y Cajal at 25 sites in Spain.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

This clinical trial aims to determine whether a ReDS-guided treatment strategy is superior to the current standard of care for adults hospitalized with heart failure. Additionally, the study will evaluate the safety and cost-effectiveness of this approach. The study seeks to answer the following key questions: 1. Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
Remote Dielectric Sensing System and Blinded ReDS data
Type of treatment
Medical device
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
1,014 participants
Where
25 sitesSpain
Study dates
29 Jan 2026to 31 Aug 2027
Phase
Interventional
Are there results?
Not yet: the study is under way

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 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Hospitalized due to heart failure as the main reason, including the presence of symptoms and signs of congestion, regardless of the left ventricular ejection fraction (LVEF).
  • NT-proBNP greater than 1000 pg/L or BNP greater than 300 pg/L upon admission.

Who cannot join

  • Height less than 150 cm or greater than 190 cm or body mass index (BMI) less than 22 or greater than 39, conditions where the use of ReDS is not approved.
  • Patients requiring inotropes (levosimendan is allowed) or vasopressors upon admission, with mechanical support, or heart transplant recipients.
  • Any malformation or variant affecting the right lung anatomy (e.g., a pacemaker).
  • Patients with any heart disease requiring a planned surgical intervention (CABG, valve disease, or other) or percutaneous (TAVR, STE-ACS, mitral or tricuspid valve repair, CRT) during the clinical trial.
  • Chronic kidney disease with a GFR <20 or on hemodialysis.
  • Life expectancy less than 12 months due to non-cardiological origin.
  • Participation in another clinical trial with intervention.

Trial locations and contacts

25 sites in 1 country. Contact the study team or a site near you to ask about taking part.

Jesús Álvarez-García, MD, PhD contact

34 667495661

jalvarezg82@gmail.com

Cristina Rey Iborra, BSN contact

creyi@salud.madrid.org

25 sites in 1 country

Spain25 sites, 25 recruiting
  • Arnau de Vilanova University Hospital

    Barcelona

    Ramón Bascompte Claret, MD, PhD, 34 961 97 60 00, rbascompte.lleida.ics@gencat.cat

    Not yet recruiting
  • Bellvitge University Hospital

    Barcelona

    Herminio Morillas Climent, MD, PhD, 34 932 60 75 00, herminiomorillas@bellvitgehospital.cat

    Recruiting
  • Hospital Clinic

    Barcelona

    Eduard Solé González, MD, PhD, 34 932 27 54 00, edsole@clinic.cat

    Not yet recruiting
  • Hospital del Mar

    Barcelona

    Sandra Valdivielso Moré, MD, PhD, 34 932 48 30 00, svaldivielso@hmar.cat

    Recruiting
  • Vall d'Hebrón University Hospital

    Barcelona

    Toni Soriano Colomé, MD, PhD, 34 934 89 30 00, tonisorianocolome@gmail.com

    Not yet recruiting
  • Reina Sofía University Hospital

    Córdoba

    Manuel Pérez Anguita, MD, PhD, 34 911 91 40 00, manuelp.anguita.sspa@juntadeandalucia.es

    Recruiting
  • Dr Josep Trueta University Hospital

    Girona

    Aleix Tort Pal, MD, PhD, 34 972 94 02 00, afort.girona.ics@gencat.cat

    Recruiting
  • Ramón y Cajal University Hospital

    Madrid, Madrid, 28034

    Jesús Álvarez-García, MD, PhD, 34 677495661, jalvarezg82@gmail.com

    Cristina Rey Iborra, BSN, creyi@salud.madrid.org

    Recruiting
  • 12 de Octubre University Hospital

    Madrid

    Laura Morán Fernandez, MD, 34 913 90 80 00, lauramoranfernandez@gmail.com

    Recruiting
  • Clínico San Carlos University Hospital

    Madrid

    Josebe Goirigolzarri Artaza, MD, PhD, 34 913 30 30 00, josebegoiri@gmail.com

    Not yet recruiting
  • Fundación Jiménez Díaz University Hospital

    Madrid

    Mikel Taibo Urquía, MD, PhD, 34 915 50 48 00, Mikel.taibo@fjd.es

    Not yet recruiting
  • Gregorio Marañón University Hospital

    Madrid

    Zorba Blázquez Bermejo, MD, PhD, 34 915 86 80 00, zorbablbe@gmail.com

    Not yet recruiting
  • La Paz University Hospital

    Madrid

    Angel Iniesta Manjavacas, MD, PhD, 34 917 27 70 00, a.m.iniesta84@gmail.com

    Recruiting
  • La Princesa University Hospital

    Madrid

    Pablo Díez Villanueva, MD, PhD, 34 915 20 22 00, pdiezvillanueva@secardiologia.es

    Not yet recruiting
  • Puerta de Hierro Majadahonda University Hospital

    Madrid

    Mercedes Rivas-Lasarte, MD, PhD, 34 911 91 60 00, rivaslasarte@gmail.com

    Recruiting
  • Virgen de la Victoria University Hospital

    Málaga

    Ainhoa Robles Mezcua, MD, PhD, 34 951 03 20 00, ainhoa.mezcua@gmail.com

    Recruiting
  • Virgen de la Arrixaca

    Murcia

    Noelia Fernández Villa, MD, 34 968 36 95 00, noelia.fernandez7@um.es

    Not yet recruiting
  • Complejo Asistencial Universitario de Salamanca

    Salamanca

    David González Calle, MD, PhD, 34 923 29 11 00, davidgonzalezcalle@gmail.com

    Not yet recruiting
  • San Juan Despí Moisès Broggi Hospital

    Sant Joan Despí

    Román Freixa Pamies, MD, PhD, roman.freixa@sanitatintegral.org

    Recruiting
  • Marqués de Valdecilla University Hospital

    Santander

    Gonzalo Martín Gorrria, MD, 34 942 20 25 20, gonzalo.martin@scsalud.es

    Not yet recruiting
  • Complejo Hospitalario Universitario de Santiago

    Santiago de Compostela

    Inés Gómez Otero, MD, PhD, 34 981 95 00 00, mgo300971@gmail.com

    Recruiting
  • Virgen de la Macarena University Hospital

    Seville

    Alejandro Recio Mayoral, MD, PhD, 34 955 00 80 00, recioalejandro@yahoo.es

    Not yet recruiting
  • Sant Joan XXIII University Hospital

    Tarragona

    María Ferrero Guillem, MD, 34 977 29 58 00, mariaferrero23@gmail.com

    Not yet recruiting
  • Hospital General Universitario de Toledo

    Toledo

    Marta Flores Hernáne¡, MD, 34 925 26 92 00, flores13marta@gmail.com

    Not yet recruiting
  • Clínico University Hospital

    Valencia

    Julio Núñez Villota, MD, PhD, 34 961 97 35 00, yulnunez@gmail.com

    Not yet recruiting

Other trials in Spain

About this study

Official title: ReDS-guided Decongestion Strategy in Patients Hospitalized for Heart Failure: the ReDS-SAFE HF II Trial

This clinical trial aims to determine whether a ReDS-guided treatment strategy is superior to the current standard of care for adults hospitalized with heart failure. Additionally, the study will evaluate the safety and cost-effectiveness of this approach.

The study seeks to answer the following key questions:

Read more
  1. Does the ReDS-guided strategy reduce the risk of cardiovascular events during the first month following hospital discharge?
  2. What is the safety profile of this treatment strategy?

Researchers will compare the ReDS-based strategy against the current standard of care. All participants will:

  • Undergo daily assessments using the ReDS device throughout their hospitalization.
  • Attend two follow-up visits post-discharge, scheduled at 2 weeks and 30 days.
Being tested
Remote Dielectric Sensing System, Blinded ReDS data
Keywords
Heart failure, Congestion, ReDS, Fluid Overload, Randomized Clinical Trial
Medical subject headings
Heart Failure, Edema

What participants receive

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

  • Remote Dielectric Sensing SystemDevice

    The ReDS system consists of 2 sensors that are placed (sitting or supine) on the front (infraclavicular) and back (below the scapula) of the patient's right hemithorax and in 45 seconds accurately quantifies the proportion of fluid in the lung. The sensors are connected via 1 cable to a touchscreen monitor that easily guides the measurement process and stores this information. The accuracy of this technology has been validated with high-resolution chest computed tomography and invasive hemodynamic measurements with a Swan-Ganz catheter. Normal ReDS values range between 20% and 35% (i.e., 20-35% of the lung would be fluid). Above 35% is considered congestive, whereas below 20% the lung would be "dry" or dehydrated.

  • Blinded ReDS dataDevice

    The responsible physician will not have access to the ReDS values and will adjust the treatment according to their clinical judgment and local practices. Discharge can be given if the clinical stability criteria are met.

Study groups in NCT07484009
Study groupRoleWhat they receive
ReDS-guided strategyExperimentalEach day, the clinician responsible for the patient will have access to the ReDS value and will adjust the treatment according to the study's diuretic protocol. The responsible physician can discharge the patient if the clinical stability criteria are met, and the ReDS value is below 35% and a relative reduction of 10% or more from the admission ReDS value has been achieved (i.e. a patient admitted with a ReDS value of 36% should be discharged with a ReDS of 32% at least; or a patient admitted with a ReDS of 34% should be discharged with a ReDS of 31% at least). If the ReDS criteria are not met, the patient should remain hospitalized for another day until these conditions are met. Clinical stability is defined as the presence of at least 2 of the following 3 conditions: i) discharge weight lower than admission weight, ii) at least a 30% reduction in natriuretic peptide from admission, and iii) a score <2 in the Orthoedema score
Receives: Device: Remote Dielectric Sensing System
Usual clinical practice strategySham comparatorThe responsible physician will not have access to the ReDS values and will adjust the treatment according to their clinical judgment and local practices. Discharge can be given if the clinical stability criteria are met.
Receives: Device: Blinded ReDS data

What is being measured

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

  1. Number of participants with an efficacy event at 1 month after discharge

    The primary outcome measure is the combined event rate of all-cause mortality, HF readmission, and/or unexpected HF visits requiring diuretic adjustment at 1 month after discharge

    Measured: From randomization to the end of follow-up at 1 month after hospitalization discharge

  2. Number of participant with a safety event at 1 month after discharge

    The primary outcome measure is the combined event rate of symptomatic systolic hypotension (<90 mmHg), electrolyte imbalances (potassium below 3 or above 5.5 meq/L), and/or worsening of renal function compared to the baseline visit at the first post-discharge outpatient visit (at least 50% reduction in glomerular filtration rate).

    Measured: From randomization to the end of follow-up at 1 month after hospitalization discharge

Secondary outcomes (1)
  1. Cost-efficacy outcome measure

    Length of stay and cost of ReDS device

    Measured: Length of stay of index admission

Timeline

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

  1. First posted19 Mar 2026
  2. Study start29 Jan 2026
  3. Primary completion30 Jun 2027 (estimated)
  4. Study completion31 Aug 2027 (estimated)

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 N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Double blind
Who is masked
Care provider, Outcomes assessor
Enrolment
1,014 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07484009
Sponsor's protocol ID
208/24
Other IDs
PI24/01541, SEC/FEC-INV-CLI 24/17
Acronym
ReDS-SAFE HF 2
Status last verified
Mar 2026
First submitted
6 Mar 2026
Last updated
19 Mar 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
Yes
Individual data sharing
Undecided

Publications

  • Lala A, Barghash MH, Giustino G, Alvarez-Garcia J, Konje S, Parikh A, Ullman J, Keith B, Donehey J, Mitter SS, Trivieri MG, Contreras JP, Burkhoff D, Moss N, Mancini DM, Pinney SP. Early use of remote dielectric sensing after hospitalization to reduce heart failure readmissions. ESC Heart Fail. 2021 Apr;8(2):1047-1054. doi: 10.1002/ehf2.13026. Epub 2020 Dec 18.

    PubMed 33336881
  • Alvarez-Garcia J, Lala A, Rivas-Lasarte M, De Rueda C, Brunjes D, Lozano-Jimenez S, Garcia-Sebastian C, Mitter S, Remior P, Jimenez-Blanco Bravo M, Del Prado S, Barghash M, Gonzalez-Ferrer E, Ullman J, Cobo M, Segovia-Cubero J, Zamorano JL, Pinney SP, Mancini D. Remote Dielectric Sensing Before and After Discharge in Patients With ADHF: The ReDS-SAFE HF Trial. JACC Heart Fail. 2024 Apr;12(4):695-706. doi: 10.1016/j.jchf.2024.01.002. Epub 2024 Feb 28.

    PubMed 38430084

Questions about this trial

What is this clinical trial studying?

A study testing Remote Dielectric Sensing System and Blinded ReDS data in people with Acute Heart Failure (AHF) and Heart Failure (for Example, Fluid Overload), run by Fundacion para la Investigacion Biomedica del Hospital Universitario Ramon y Cajal at 25 sites in Spain.

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 2 inclusion and 7 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: looking for participants now, as of the sponsor's last update on 19 Mar 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 25 sites in Spain. 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. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

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

Contact Jesús Álvarez-García, MD, PhD (34 667495661, jalvarezg82@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of participants with an efficacy event at 1 month after discharge (time frame: From randomization to the end of follow-up at 1 month after hospitalization discharge). The study lists 2 primary outcomes in all. 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 NCT07484009, which also lists 2 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 19 Mar 2026.

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