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RecruitingNCT06465498IcarUSUpdated Apr 1, 2026

Investigating aCute heArt failuRe Decongestion Guided by Lung UltraSonography

An interventional study of LUS decongestive strategy and PE decongestive strategy in Acute Heart Failure, sponsored by Antonio Leidi. Recruiting at 5 sites in Switzerland. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-04-01.

Sponsored by Antonio Leidi · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Started Oct 2024; still recruiting 1 year 11 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
222
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The goal of this clinical trial is to investigate whether a lung ultrasonography (LUS)-guided decongestion strategy in adults hospitalized for acute heart failure (AHF) can improve patient-centered outcomes.

The main questions it aims to answer are:

  • Does this strategy shorten the length of stay and reduce early hospital readmissions?
  • Does this strategy improve patients' symptoms and quality of life ?

Researchers will compare LUS to physical examination (PE).

Read the detailed description

Background: Despite recent medical advances, AHF remains one of the leading causes of hospital admissions and one of the most frequent reasons for readmission. As the main reason for AHF hospitalization is congestion-driven symptoms, the cornerstone of treatment is decongestive therapy. In the absence of specific quantitative measures, however, undertreatment often occurs and is associated with an increased risk of readmission. LUS is highly accurate for detecting extravascular lung water (EVLW). It has shown clinical benefits when used to guide decongestive therapy in chronic heart failure ambulatory patients. However, data for its use in AHF inpatients are currently lacking.

Aim: To investigate the effect of a bedside LUS-guided decongestive therapy in hospitalized AHF adults on patient-centered outcomes, as compared to usual care.

Methodology: This will be a Swiss multicenter, blinded, randomized controlled trial (RCT) aiming to recruit 222 adults hospitalized for congestive acute heart failure (AHF). Study participants will be included within the first 48 hours of their hospital arrival. Patients will be randomized to either a LUS-guided decongestive strategy or a decongestive strategy based on a structured physical examination. The primary outcome will be the number of days spent alive outside the hospital within a 40-day timeframe from study inclusion (DAOH-40). This outcome integrates length of stay, early readmission, emergency room visits, and mortality.

02

Conditions studied

  • Acute Heart Failure

Keywords

  • Lung ultrasonography
  • Ultrasound
  • Point-of-care ultrasonography
  • Decongestion
  • Diuretic
03

In context

Lead sponsor

This is the only study on the registry with Antonio Leidi as lead sponsor.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

Inclusion Criteria:

  • ≥ 18 years old
  • Planned or actual admission to intermediate care units, general internal medical or cardiology wards
  • Diagnosis of congestive AHF on admission chart (primary or secondary diagnosis)
  • Raised value of N terminal-pro-brain natriuretic peptide (≥1000 ng/l).

Key Exclusion Criteria:

  • Known isolated right heart failure
  • Systolic blood pressure \<90 mmHg, mean arterial pressure \<65 mmHg at the moment of inclusion
  • The following conditions mimicking lung cardiogenic oedema on LUS if known at inclusion and documented: Interstitial lung disease, lung cancer or metastasis, acute respiratory distress syndrome, pulmonary contusion
  • Known virologically confirmed SARS-CoV-2 pneumonia in the preceding 3 months
  • Unwillingness to give consent
  • Subjects who are pregnant or breastfeeding
  • Hospitalisation for palliative care and probable end-life within 30 days
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
222 participants (estimated)

Study arms

  • Experimental
    Lung ultrasonography (LUS)

    The antero-lateral thorax is examined using an 8-point protocol. Each region is coded positive in presence of ≥3 B-lines simultaneously on a frozen image or in presence of significant pleural effusion (i.e. extending over the costophrenic angle). A 4-level congestion score is defined: absence of congestion (0-1 positive points), mild congestion (2-3 positive points), moderate congestion (4-5 positive points) and severe congestion (6-8 positive points).

    Procedure: LUS decongestive strategy

  • Active comparator
    Physical Examination (PE)

    Congestion is clinically assessed by calculating the Everest score. This score, previously used in clinical trials, is composed of 3 congestion symptoms (i.e. dyspnea, orthopnoea and fatigue) and 3 congestion signs (i.e. jugular vein distension, lung rales, oedema), each graded from 0 to 3. From the total score, a sub-score is derived, ranging from absence of congestion to severe congestion.

    Procedure: PE decongestive strategy

Interventions

  • ProcedureLUS decongestive strategy

    LUS results are documented in the electronic case report form (eCRF) and converted into a common score ranging from absence of congestion to severe congestion. This generic congestion score will be communicated to the treating physician by the research personnel, along with a proposal to step-up, maintain, or step-down the decongestive therapy.

  • ProcedurePE decongestive strategy

    PE results are documented in the eCRF and converted into a common score ranging from absence of congestion to severe congestion. This generic congestion score will be communicated to the treating physician by the research personnel, along with a proposal to step-up, maintain, or step-down the decongestive therapy.

06

What researchers measure

Primary outcomes

  1. DAOH-40

    Number of days spent alive outside the hospital in a 40-day timeframe from study inclusion. This outcome ultimately evaluates number of days spent alive and nonhospitalized, simultaneously assessing (re)hospitalization, unplanned emergency visits and mortality

    Time frame: 40 days from study inclusion

Secondary outcomes

  1. Successful decongestion

    Proportion of participants obtaining successful decongestion, i.e the absence of signs of volume overload as defined by the Acetazolamide in Decompensated Heart Failure with Volume Overload (ADVOR) congestion score.

    Time frame: 3 working days after randomization

  2. Diuretic dose

    Mean daily dose of diuretic therapy during study intervention (in furosemide iv equivalent)

    Time frame: Uo to 6 working days after randomisation

  3. EQ-5D-5L questionary

    Quality of life questionary. EQ-5D-5L index scores range from -0.59 to 1, where 1 is the best possible health state; EQ VAS scores range from 0 to 100, where 100 is the best possible health state.

    Time frame: Up to 90 days after discharge

  4. Readmission and any-cause mortality

    Rate of hospital readmissions and deaths occurring within 90 days of discharge

    Time frame: Up to 90 days after discharge

  5. HF-related hospitalisation

    Rate of HF-related hospitalisation, as defined by the presence of worsening signs and symptoms of HF and an intensification of the diuretic therapy

    Time frame: Up to 90 days after discharge

  6. Length of hospital stay

    Mean length of hospital stay

    Time frame: Through hospitalization, an average of 9 days

  7. Dyspnea

    Dyspnea assessed with a 100-mm Visual Analog Scale (VAS), score ranging from 0 to 100, higher scores mean worse outcome.

    Time frame: Up to 90 days after discharge

  8. Anxiety and depression

    Hospital Anxiety and Depression Scale, two subscales ranging from 0 to 21 points, higher scores mean worse outcome.

    Time frame: Up to 90 days after discharge

Other outcomes

  1. Worsening of renal function

    ≥50% rise of serum creatinine from baseline value

    Time frame: Up to 6 working days after randomisation

  2. Hyponatremia

    Rate of severe hyponatremia \<120 mmol/l

    Time frame: Up to 6 working days after randomisation

  3. Hypokaliemia

    Rate of severe hypokaliemia \<2.5 mmol/l

    Time frame: Up to 6 working days after randomisation

  4. Sustained hypotension

    proportion of patients needing vasopressor/inotropic agents because of sustained hypotension

    Time frame: Up to 6 working days after randomisation

07

Study locations

4 of 5 sites recruiting
  • Trois-Chêne Hospital, Geneva Univesity Hospitals
    Geneva, Canton of Geneva 1204, Switzerland
    Recruiting
  • Geneva University Hospitals
    Geneva, Canton of Geneva 1205, Switzerland
    Recruiting
  • Inselspital, Universitätspital
    Bern, Switzerland, Switzerland
    Recruiting
  • Fribourg University Hospital
    Fribourg, Switzerland
    Recruiting
  • Ospedale Civico, Ente Ospedaliero Cantonale
    Lugano, Switzerland
    Terminated
08

References and documents

Publications

  • Leidi A, Mann T, Gosselin P, Bedulli M, Esposito F, Schneider C, Parent T, Combescure C, Desmettre T, Reny JL, Stirnemann J, Grosgurin O; ICARUS study group. The ICARUS project: study protocol for a randomised controlled trial Investigating aCute heArt failuRe decongestion guided by lung UltraSonography. Trials. 2026 Apr 22;27(1):414. doi: 10.1186/s13063-026-09701-8. PubMed 42021403 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 1, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06465498
Lead sponsor
Antonio Leidi
Collaborators
University Hospital, Geneva
Responsible party
Antonio Leidi (M.D., Principal Investigator, Attending physician in Internal and Emergency Medicine Services, University Hospital, Geneva) — Sponsor-investigator
First posted
Jun 20, 2024
Start date
Oct 22, 2024
Primary completion
Apr 30, 2027 (estimated)
Completion
Apr 30, 2027 (estimated)
Last update
Apr 1, 2026

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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