Energetic Abnormalities in Heart Failure With Preserved Ejection Fraction
Energetic Abnormalities in Heart Failure With Preserved Ejection Fraction
Up to half of all patients with heart failure are found to have normal pumping function of
 the heart muscle, but show abnormalities in the way the heart muscle relaxes and fills with
 blood. These patients often have high blood pressure, and tend to have stiff arteries and
 stiff heart muscle. We wish to test the hypothesis that these patients have abnormal energy
 stores in their heart muscle.
Inclusion Criteria:

 -  Clinical features consistent with heart failure

 -  LVEF ≥ 50%, with no evidence of significant valvular disease, no hypertrophic
 cardiomyopathy, and no evidence of pericardial constriction

 -  A peak VO2 < 80% predicted, with a pattern of gas exchange on metabolic exercise
 testing indicating a cardiac cause for limitation

 Exclusion Criteria:

 -  Objective evidence of lung disease on formal lung function testing

 -  Reversible myocardial ischaemia on contrast-enhanced myocardial stress

 -  Echocardiography, and evidence of exercise-induced mitral regurgitation

 -  Obesity (BMI >35) or a locomotor cause for exercise limitation