This randomized controlled trial will evaluate the effect of a ketogenic diet and/or exogenous administration of ketone bodies vs conventional diet on the ejection fraction of patients with non-ischemic chronic heart failure, measuring MRI biomarkers.

Evidence in both animals and humans suggests ketosis could be beneficial for people living with chronic heart failure. To date, no study has compared endogenous vs exogenous ketosis in patients with chronic heart failure. We will randomize (with a 1:1:1 ratio) patients with a confirmed diagnosis of non-ischemic chronic heart failure to undergo one of the following:

1. - A ketogenic diet (<50 gr of carbohydrates per day) incorporating current recommendations for heart failure (low sodium and liquids) for 10 days.
2. - Standard diet incorporating current recommendations for heart failure (low sodium and liquids) and supplementation with exogenous ketones (ketone monoester) for 10 days.
3. - Standard diet incorporating current recommendations for heart failure (low sodium and liquids) and supplementation with bitter taste placebo.

The endpoints will be assessed using cardiac MRI and blood biomarkers.

Inclusion Criteria:

• Ejection fraction <40% minimum 1 month.
• No change in optimum treatment 1 month at least.

Exclusion Criteria:

• Ischemic cardiopathy (Angio-tomography corroborated cut-point >50% obstruction, coronary angiography, or cardiac scintigraphy 6 months at least) or angina pectoris symptoms.
• Reynaud syndrome
• Metformin or SGLT-2 Inhibitors treatment, Low BMI, nutritional deficiencies.
• Creatinin clearance <30ml/min or renal replacement therapy
• MRI contraindications (prothesis, Unsupported pacemakers, claustrophobia, etc)
• Reynaud phenomenon history

Upon request to PI

One year after publication

Send email to adrian.sotom@incmnsz.mx