Clinical trial Recruiting at 3 sites Interventional Ages 18 and up

High-fat diet for heart metabolism in non-ischemic dilated cardiomyopathy

Official title: Cardiac Metabolic Reprogramming by a Nutritional Intervention: the High Fat Diet for Heart Failure (HF4HF) Study, a proof-of Concept Randomized Controlled Trial

Run by Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III · NCT06747429 · Data updated 2026-11-12

A small human study will test whether a high-fat diet can improve heart function in adults with non-ischemic dilated cardiomyopathy and reduced ejection fraction.

More Heart Failure With Reduced Ejection Fraction trials

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment80 (estimated)
SponsorFundación Centro Nacional de Investigaciones Cardiovasculares Carlos III
Academic / other
Locations5 sites (Paris and 4 other locations)
StatusRecruiting
StartedJanuary 15, 2026
Main results expectedJune 2026
Study endsDecember 2026
Registry record updatedMay 26, 2026
Trial IDNCT06747429 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (≥18) with non-ischemic DCM and LVEF ≤49% who are on optimized HF therapy and able to adhere to dietary interventions.

Probably not a fit

Patients without non-ischemic DCM or with unstable HF or contraindications to high-fat intake may not benefit.

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

What this trial studies

This interventional study investigates whether increasing dietary fat intake can shift heart energy use back toward fatty acids in patients with non-ischemic dilated cardiomyopathy and heart failure with reduced ejection fraction. Eligible participants are adults with confirmed non-ischemic DCM, LVEF ≤49%, and stable guideline-directed therapy for at least 3 months. Participants will be assigned to a high-fat diet or a standard diet to assess effects on cardiac function and related metabolic parameters. The study builds on preclinical data suggesting metabolic remodeling with high-fat intake may improve myocardial function in this condition. Safety monitoring and exclusion criteria are in place to minimize risks related to lipid levels and heart failure stability.

Why it matters

Potential benefit: If successful, the approach could improve heart function and metabolic efficiency in patients with non-ischemic DCM and HF with reduced ejection fraction.

How similar studies have gone: Preclinical models and a small translational human study have suggested potential benefits of lipid-based approaches on heart metabolism and function.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients of both sexes and ≥18 years old
* Patients diagnosed with HF secondary to non-ischemic DCM, according to ESC guidelines definition,1 with or without a known genetic basis.
* LVEF ≤49% according to the baseline CMR.
* Optimized HF guideline-directed medical therapy for at least 3 months prior to inclusion.
* Patients who have provided informed consent.

Exclusion Criteria:

* Prior diagnosis of ischemic DCM.
* Prior diagnosis of established atherosclerotic cardiovascular disease (angina/myocardial infarction, transient ischemic attack/stroke, lower limb ischemia or at any other peripheral level).
* Changes in HF therapies within the last 3 months.
* HF decompensation within the previous 3 months, including HF hospitalization or the need of ambulatory intravenous diuretic or inotropic treatment such as levosimendan.
* Uncontrolled dyslipidemia, defined as LDL-cholesterol \>160 mg/dL and/or triglycerides \>200 mg/dL, despite treatment.
* Any contraindication for CMR:

Severe claustrophobia. Any device which is known to threaten or pose hazard in all MR environments. //www.mrisafety.com/ Patients with implanted biomedical devices (cardiac artefacts): pacemakers, cardiac defibrillators or cardiac resynchronization therapy.

* Liver and biliary diseases, including prior diagnosis of non-alcoholic fatty liver disease and unoperated cholelithiasis.
* Prior episodes of acute pancreatitis or chronic pancreatitis.
* Prior fish or nut allergy.
* Life expectancy less than 12 months.
* Pregnancy or planned pregnancy for the next 4 months.
* Current lactation.
* Patients participating in other randomized clinical trial.
* Impossibility to consent or undergo study follow-up

Where it's running

  • University of Medicine and Pharmacy "Carol Davila", Bucharest,
    Bucharest, Romania
    Recruiting
  • Fundación Investigación Biomédica Hospital Universitario Puerta de Hierro (IIS),
    Madrid, Spain
    Recruiting
  • Hospital Universitario Fundación Jiménez Díaz,
    Madrid, Spain
    Recruiting
  • Hôpital Européen Georges Pompidou, INSERM
    Paris, France
    Not yet recruiting
  • University of Florence, Clinical and Experimental Medicine, Unit of Clinical Nutrition,
    Florence, Italy
    Not yet recruiting

Study contacts

  • Principal investigator: Francesco Sofi, MD PhD — University of Florence, Clinical and Experimental Medicine, Unit of Clinical Nutrition, Florence,
  • Study coordinator: Carlos Nicolás Pérez-García, MD PhD.
  • Email: carlosnicolas.perez@cnic.es
  • Phone: (+34) 914531200

Similar studies

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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.
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.