Heart Failure With Normal Ejection Fraction Clinical Trial
The Heart Failure With Preserved Ejection Fraction (HFpEF) Pathophysiology Study. Does Ageing Coupled With Vascular Effects of Comorbidities Lead to HFpEF? An In-depth Understanding From a Tertiary Centre
|Source||University Hospitals Coventry and Warwickshire NHS Trust|
|Contact||Danish Ali, MB ChB, MRCP|
|Start date||June 6, 2017|
|Completion date||April 2019|
The study addresses the hypothesis that a gradual build-up in arterial resistance and
microvascular endothelial dysfunction due to common comorbidities such as hypertension and
diabetes mellitus, on top of age related vascular and cardiac changes (mainly fibrosis and
hypertrophy), is responsible for HFpEF. The HFpEF syndrome is commonly seen in elderly
subjects (often females) with hypertension and diabetes.
The investigators will investigate the vascular function, cardiovascular performance and myocardial fibrosis in different cohorts of subjects to try and prove this hypothesis. There will be 5 groups of subjects, all ≥ 70 years of age, as follows:
A) Normal healthy volunteers without major comorbidities including hypertension or diabetes B) Patients with hypertension only (without diabetes mellitus) C) Patients with hypertension AND diabetes mellitus D) Patients with HFpEF. E) A parallel group of patients with Heart Failure with reduced Ejection Fraction (HFrEF) group.
Arterial resistance measured by pulse wave velocity will be the primary measure and will be compared between groups A to D. A separate comparison will be made between groups D and E. Other secondary measures will focus on endothelial function (Laser Doppler measurements) and other cardiovascular performance measures (peak VO2 by CPEX, 6-minute walk distance). Bloods samples will be taken for NT-proBNP, high sensitivity Troponin T, Galectin 3 and also stored for testing later for vascular biomarkers.
The study will be a pathophysiological, single-centre, observational study, in which all 4
groups, including the parallel-group will be investigated in terms of qualitative-,
echocardiographic-, arterial resistance, exercise testing (CPEX and 6-MWT), endothelial
dysfunction assessment by Laser Doppler and vascular biomarker measurements. We intend to
investigate if there is increasing arterial resistance from group "A" to group "D" and a
significant difference in arterial resistance between groups "D" and "E" by measuring the
Primary Outcome Our primary outcome will be a difference in arterial resistance between the groups and the parallel group, as measured by aortic PWV.
The secondary outcomes are to assess and compare endothelial function and cardiovascular performance in all groups as measured by the following:
- Blood tests: NTproBNP, Galectin-3
- Urinalysis: Albumin, Creatinine and Metabolite profiles ("metabolomics"), related to cardiovascular risk and insulin resistance
- Transthoracic echocardiography (TTE) indices of LV diastolic function, tissue Doppler imaging and strain rate imaging
- Exercise tolerance: 6-minute walk test and a Cardiopulmonary Exercise Test (CPEX)
- Microvascular function: Laser Doppler
|Not yet recruiting||
|Not yet recruiting||
|Active, not recruiting||