Heart failure with preserved ejection fraction (HFpEF), also referred to as diastolic heart failure, is a clinical syndrome that occurs when the lower left chamber (left ventricle) is not able to fill properly with blood during the diastolic (filling) phase.
The ejection fractions measure how much blood inside the ventricle is pumped out with each contraction.
Nick Hartshorne-Evans, founder of the campaign group Pumping Marvellous, said: “On this group of patients, even a slight improvement in quality of life is important.
“There are so few treatment options for HFpEF that the National Institute for Health and Care Excellence doesn’t even have specific prescribing guidelines for it. And this affects more than 600,000 people in Britain.