Bi Treatment With Hydralazine/Nitrates Versus Placebo in Africans Admitted With Acute Heart Failure (B-AHEF)
To investigate the effect of hydralazine isosorbide dinitrate on clinical outcomes, symptoms, cardiac parameters and functional status of African patients hospitalized with AHF and left ventricular dysfunction during 24 weeks of therapy.
Administration of hydralazine/nitrates will be superior to placebo administration in reducing HF readmission or death, improving dyspnoea, reducing blood pressure and brain natriuretic peptide (BNP) in African patients admitted with AHF and left ventricular dysfunction.
Acute Heart Failure
Left Ventricular Dysfunction
Drug: Isosorbide Dinitrate
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||A Prospective, Placebo-controlled, Double-blind, Randomized Study to Compare Treatment With Hydralazine-isosorbide-dinitrate (HYIS) Versus Placebo on Top of Standard Care in African Patients Admitted With Acute Heart Failure (AHF) and Left Ventricular Dysfunction|
- Time to death or HF re-admission [ Time Frame: through to day 180 ] [ Designated as safety issue: Yes ]In African patients admitted with acute heart failure, to investigate the effect of the combination of hydralazine/isosorbide dinitrate (HYIS) on the rate of death or re-admission for HF during 24 weeks of therapy
- Change in symptoms of heart failure [ Time Frame: within 7 days post randomization ] [ Designated as safety issue: Yes ]Change in symptoms of HF from baseline to 7 days post randomization or discharge, as assessed by dyspnoea severity and global well being on a VAS scale
- Change in systolic blood pressure [ Time Frame: within 7 days post randomization ] [ Designated as safety issue: Yes ]Change in systolic blood pressure from baseline to 7 days post randomization or discharge and at 8 weeks and 24 weeks post randomization
- Functional status [ Time Frame: 7 days post randomization ] [ Designated as safety issue: No ]Functional status assessed by 6 minute walk at 7 days post randomization or discharge, and at 8 weeks and 24 weeks post randomization
- Changes in serum creatinine [ Time Frame: up to 8 weeks post randomization ] [ Designated as safety issue: No ]Changes in serum creatinine, blood urea nitrogen (BUN) and estimated glomerular filtration rate (eGFR) from baseline to 8 weeks post randomization and at 24 weeks post randomization
- Change in left ventricular dimensions [ Time Frame: up to 24 weeks post randomization ] [ Designated as safety issue: Yes ]Change in left ventricular dimensions and left ventricular ejection fraction (LVEF) from baseline to 24 weeks post randomization.
|Study Start Date:||January 2013|
|Estimated Study Completion Date:||July 2016|
|Estimated Primary Completion Date:||January 2016 (Final data collection date for primary outcome measure)|
Active Comparator: Hydralazine
24 week course of Hydralazine 25mg 3 times daily for 4 weeks, thereafter uptitrating to 50mg hydralazine 3 times daily up to week 24. Those assigned to the Hydralazine control arm will receive the same number of identical placebo tablets.
Hydralazine and placebo will be supplied as 25mg identical tablets and given at a dosage of 75mg/day up to week 4, thereafter 150mg/day up to week 24.
Other Name: Hyperphen
Active Comparator: Isosorbide dinitrate
24 week course of Isosorbide dinitrate 10mg 3 times daily for 4 weeks, thereafter uptitrating to 20mg isosorbide dinitrate 3 times daily up to week 24. Those assigned to the Isosorbide dinitrate control arm will receive the same number of identical placebo tablets.
Drug: Isosorbide Dinitrate
Isosorbide dinitrate and placebo will be supplied as 10mg identical tablets and given at a dosage of 30mg/day up to week 4, thereafter 60mg/day up to week 24.
Other Name: Isordil
Hide Detailed Description
Heart failure (HF) is a pathophysiologic condition and is a final common pathway of most forms of cardiovascular disease. Patients with HF experience poor quality of life, recurrent emergency hospitalizations and premature mortality.
Recent publications highlight the multiple challenges of dealing with an increasing burden of heart disease within an urban African community. The predominance of women and novel underlying causes contrast with the demographic of HF in high income countries. More than 50% of 5328 de novo cases of heart disease captured at a tertiary clinic in Soweto presented with some form of heart failure, mainly due to poorly treated hypertension, idiopathic dilated cardiomyopathy, peripartum cardiomyopathy and HIV-related cardiomyopathy. The most prevalent form of heart disease was hypertensive heart failure (> 1100 cases).
Programs have been developed in high income countries that cost-effectively prevent progressive cardiac dysfunction in high risk individuals and apply evidence-based treatments to optimize the overall management of HF. There is, however, a paucity of data describing the etiology and underlying cardiac structure and function, as well as contemporary management of HF in low to middle income countries.
In 2005 a number of leading clinicians from Africa and the US published a "call for action" highlighting the need for an African study documenting the aetiology of acute heart failure and the management practices applied to these patients. As a result, The Sub-Saharan Africa Survey of Heart Failure (THESUS HF) study, was initiated in 9 countries in Africa to determine aetiology, treatment, morbidity and mortality of acute heart failure (HF) in the African sub-continent. The data reported in this study are unique as they are the first larger outcome study in acute heart failure from this continent. This first multinational study of over 1000 patients with acute decompensated heart failure conducted in all regions of sub-Saharan Africa shows, for the first time, that the treatment of heart failure is sub-optimal in the region, with relatively low proven medical treatments (such as beta-blockers, hydralazine and nitrates) and inappropriately high use of aspirin in a cohort of patients with non-ischaemic heart failure. This study also had the clear purpose of enhancing research capacity in Africa via collaborative research as outlined in our publication.
The use of Ace inhibitors (ACEi) and hydralazine/nitrates has never been examined in patients admitted with acute heart failure. All studies demonstrating the beneficial effects of these drugs were performed in patients with chronic heart failure. Previous studies have shown that the administration of ACEi in African Americans with chronic heart failure is less effective and not superior to combined treatment with hydralazine/isosorbide dinitrate. The African American Heart Failure Trial (A-HeFT) established the benefit of adjunctive administration of isosorbide dinitrate/hydralazine (ISDN/HYD) in addition to standard therapy for African American patients with symptomatic heart failure. The risk of death was reduced by 33% and markers of quality of life were improved.
The THESUS registry has shown a high prevalence of hypertension with left ventricular systolic dysfunction (hypertensive heart failure) and dilated cardiomyopathy as a cause of acute heart failure in all participating African countries. Patients in Africa are rarely treated with this combination therapy as the fixed combination (Bidil) is unavailable in Africa. There is uncertainty if the combination of hydralazine and isosorbide dinitrate, available as generic agents, is beneficial in Africans and many physicians in Africa are not aware of the outcome of those studies published in high impact factor journals, often not available to local doctors.
Performing a multicentre study in Africa could confirm data obtained in African Americans, create awareness for this promising combination treatment and extend the use of the medication to patients with acute heart failure.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01822808
|Contact: Karen Sliwa, PhDfirstname.lastname@example.org|
|Contact: Lavinia Petersenemail@example.com|
|Hatter Institute for Cardiovascular Research in Africa||Recruiting|
|Cape Town, Western Cape, South Africa, 7925|
|Contact: Karen Sliwa, PhD +27-21-4066358 firstname.lastname@example.org|
|Contact: Lavinia Petersen +27-72-2171166 email@example.com|
|Principal Investigator: Karen Sliwa, PhD|
|Sub-Investigator: Bongani Mayosi, MD PhD|
|Sub-Investigator: Mpiko Ntsekhe, MD|
|Sub-Investigator: Dirk Blom, MD|
|Sub-Investigator: Tawanda Butau, MD|
|Sub-Investigator: Kemi Tibazarwa, MD|
|Principal Investigator:||Karen Sliwa, PhD||Hatter Institute for Cardiovascular Research In Africa (HICRA), University of Cape Town|
|Study Director:||Gad Cotter, MD||Momentum Research, Inc.|