Rt Ventricular Substrate Metabolism as a Predictor of Rt Heart Failure in Patients With Pulmonary Arterial Hypertension (RVMET)
The purpose of this study is to evaluate patterns of metabolic activity in the heart of patients with pulmonary arterial hypertension(PAH). Patients with PAH are at risk of developing weakness or failure of the right side of the heart.It is possible that there is a relationship between the development of heart failure and the way the heart uses energy sources, such as sugar. This study is designed to evaluate the way the heart uses sugar uptake in patients with PAH using positron emission tomography(PET imaging)
|Study Design:||Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Basic Science
|Official Title:||Rt Ventricular Substrate Metabolism as a Predictor of Rt Heart Failure in Patients With Pulmonary Arterial Hypertension|
- Cardiopulmonary death OR clinical right heart failure hospitalization [ Time Frame: 1year ] [ Designated as safety issue: No ]Clinical RHF admission requiring ONE of the following:intravenous diuretics or an increase in oral diuretics >50%of baseline for at least 7 days.
- Change in right ventricular size and function as measured by cardiac MRI, between baseline and 1 year. [ Time Frame: 1 year ] [ Designated as safety issue: No ]
|Study Start Date:||January 2011|
|Estimated Study Completion Date:||June 2014|
|Estimated Primary Completion Date:||January 2014 (Final data collection date for primary outcome measure)|
Experimental: FTHA/GDF PET imaging
This study plans to enrol 60 subjects with Type I pulmonary arterial hypertension (PAH) and 20 healthy, age and sex individuals to serve as normal controls. These subjects will have no known cardiac or pulmonary disease.
Both groups will undergo FTHA/FDG PET imaging.
Radiation: FTHA, FDG PET imaging.
Subjects will undergo PET scans on 2 different days using 2 separate tracers, FTHA(fluoro-6-this-hepadecanoic acid) and FDG(fluoro-2- deoxy-glucose).
PAH results in premature death as a result of right ventricular dysfunction. However, there are substantial differences among patients in their tendency to develop right heart failure. This study proposes to determine if right ventricular (RV) changes can predict the development of right heart failure in patients with PAH.
In addition, the study aims to evaluate the relationship of right ventricular metabolism to other physiologic responses in PAH,including:pulmonary vascular resistance, serum BNP and changes in cardiac hypertrophy and function. In conjunction with hemodynamic measurements, biomarkers and cardiac magnetic resonance imaging (MRI); RV metabolism will be evaluated with (18F) FTHA and (18F)FDG cardiac PET imaging.
A cohort of 20 age sex matched individuals will serve as normal controls. These subjects will have no known cardiac or pulmonary disease with normal ventricular function and estimates pulmonary pressures on echocardiogram.
|Contact: Rosemary Dunne, RN||613-798-5555 ext email@example.com|
|Contact: Lisa M Mielniczuk, MDfirstname.lastname@example.org|
|University of OttawaHeart Institute||Recruiting|
|Ottawa, Ontario, Canada, K1Y4W7|
|Principal Investigator: Lisa M Mielniczuk, MD|
|Principal Investigator:||Lisa M Mielniczuk, MD||University of Ottawa Heart Institiute|