Clinical trial NCT03775577: Exercise Intolerance in Heart Failure
Official title: Exercise Intolerance in Heart Failure: the Role of Altered Cardiac and Skeletal Muscle Energetics
Study type: OBSERVATIONAL
Overall status: RECRUITING
Conditions: Heart Failure With Normal Ejection Fraction
Keywords: Heart Failure with Preserved Ejection Fraction
HFpEF
Lead sponsor: Johns Hopkins University
Sponsor class: OTHER
Collaborators: name: National Heart, Lung, and Blood Institute (NHLBI)
First posted: 2018-12-14
Enrollment: 130
Sex: ALL
Minimum age (years): 21
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: People with and without heart failure will be enrolled.

Brief summary: The investigators are studying whether metabolic abnormalities in cardiac and skeletal muscle in patients with heart failure with preserved ejection fraction (HFpEF) are associated with debilitating exercise intolerance.

Detailed description: This research is being done to better understand why patients with heart failure have difficulty exercising and performing some activities of daily living. Heart muscle and skeletal muscle (in the legs and arms) depend on normal metabolism (the conversion of foods to chemical fuel) to function properly. Investigators will measure metabolites in the heart and leg muscles, including the levels of high energy phosphates and lipids (fats) using magnetic resonance (MR) techniques. High-energy phosphates serve as a source of energy, which is used by the heart and skeletal muscle for contraction. Magnetic resonance uses magnetic fields to measure the levels of these substances.

Eligibility criteria: Inclusion Criteria:

* Patients of either gender who are greater than 21 years of age (no upper age limit),
* Permission of patient's clinical attending physician,
* Previous clinical diagnosis of HF with current New York Heart Association (NYHA) Class II-III symptoms for at least 1 month,
* Left ventricular ejection fraction (EF) \>50% by echocardiography, MRI, CT or x-ray or nuclear ventriculography within prior 12 months,
* Stable medical therapy for at least 30 days (no addition or removal or major (\>100%) dose change of Renin-Angiotensin-Aldosterone System (RAAS) antagonists, beta-blockers, or calcium channel blockers for hypertension).

Exclusion Criteria:

* Unable to understand the risks, benefits, and alternatives of participation and give meaningful consent,
* Contraindications to MRI such as implanted metallic objects (pre-existing cardiac pacemakers, cerebral clips) or indwelling metallic projectiles,
* Significant valvular abnormalities,
* Pregnant women (women of childbearing potential will undergo blood or urine pregnancy testing),
* History of clinical CAD or significant epicardial coronary disease (\>50% stenosis) in major coronary artery by x-ray or CT angiography unless (a) the patient underwent prior successful revascularization with percutaneous coronary angioplasty within the prior three years and (b) there are no residual lesions of \>50% on the most recent coronary angiographic study.
* History of infiltrative cardiomyopathy or constrictive pericarditis,
* Cor pulmonale,
* Significant pulmonary disease,
* Estimated glomerular filtration rate (eGFR) \<20ml/min,
* Any condition other than HF which could limit the ability to perform a 6MW or cardiopulmonary exercise test (CPET) test (e.g., critical peripheral vascular disease, significant orthopedic or neurological conditions),
* Any diseases other than HF which are likely to significantly alter the patient's global perception of status or quality of life over a period of 6 months.
* Significant peripheral vascular disease

Primary outcomes:
measure: Skeletal muscle mitochondrial function
timeFrame: Baseline
measure: Skeletal muscle energetic decline during exercise
timeFrame: Baseline
measure: Cardiac muscle energetics
timeFrame: Baseline
Secondary outcomes:
measure: Six minute walk test
timeFrame: Six months
measure: Cardiopulmonary exercise testing (CPET)
timeFrame: Six months
measure: Clinical heart failure outcome as assessed by number of hospitalizations
timeFrame: Two years
measure: Clinical heart failure outcome as assessed by time to cardiovascular death
timeFrame: Two years
measure: Clinical heart failure outcome as assessed by overall mortality
timeFrame: Two years
Other outcomes:
Locations:
city: Baltimore
country: United States
facility: Johns Hopkins Hospital
state: Maryland
Study officials:
affiliation: Johns Hopkins University
name: Robert G Weiss, MD
role: PRINCIPAL_INVESTIGATOR
References: