Bi Treatment With Hydralazine/Nitrates Versus Placebo in Africans Admitted With Acute Heart Failure
Information source: University of Cape Town
ClinicalTrials.gov processed this data on August 23, 2015 Link to the current ClinicalTrials.gov record.
Condition(s) targeted: Acute Heart Failure; Left Ventricular Dysfunction
Intervention: Hydralazine (Drug); Isosorbide Dinitrate (Drug)
Phase: Phase 3
Status: Active, not recruiting
Sponsored by: University of Cape Town Official(s) and/or principal investigator(s): Karen Sliwa, PhD, Principal Investigator, Affiliation: Hatter Institute for Cardiovascular Research In Africa (HICRA), University of Cape Town Gad Cotter, MD, Study Director, Affiliation: Momentum Research, Inc.
Summary
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.
Clinical Details
Official title: A Prospective, Placebo-controlled, Double-blind, Randomized Study to Compare Hydralazine-isosorbide-dinitrate(HYIS) Versus Placebo on Top of Std Care in African Patients With Acute Heart Failure (AHF) and Left Ventricular Dysfunction
Study design: Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment
Primary outcome: Time to death or HF re-admission
Secondary outcome: Change in symptoms of heart failureChange in systolic blood pressure Functional status Changes in serum creatinine Change in left ventricular dimensions
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.
This BAHEF protocol has an approved 'Amendment # 1' dated 29 April 2013. Amendments were
changes to the Eligibility criteria and have been changed on this site.
To date, 22 Sept 2014, the BAHEF study has enrolled 110 study subjects. To date, 13 Aug
2015, the BAHEF study has enrolled 145 eligible subjects.
Eligibility
Minimum age: 18 Years.
Maximum age: N/A.
Gender(s): Both.
Criteria:
Inclusion Criteria:
1. > 18 years of age
2. Hospital admission for acute heart failure as defined by the presence of acute
dyspnea and the presence of clinical signs of heart failure on physical examination.
3. Where available, NT-proBNP >900 pg/ml, >1800 pg/ml if the patient has atrial
fibrillation at screening or >450 pg/ml if BMI > 35 kg/m2, LVEF <45% assessed by
echocardiography or other method within the previous 12 months
4. Background therapy with at least ACE-inhibitor or angiotensin receptor blocker (ARB)
and beta-blocker (unless beta-blocker is contraindicated due to severe volume
overload, low output heart failure, or cardiogenic shock)
5. Available for regular follow up
Exclusion Criteria:
1. Currently being treated with Hydralazine and/or nitrates or a history of intolerance
to oral therapy with either hydralazine or nitrates.
2. . Any intravenous treatment for heart failure, except IV furosemide (eg. IV
inotropes, pressors, nitrates or nesiritide) at the time of screening.
3. Systolic blood pressure <100 mmHg
4. Plan for revascularization
5. Greater than 96 hours after admission
6. Reversible etiology of acute heart failure such as myocarditis, acute myocardial
infarction, arrhythmia. Acute MI is defined as symptoms and major electrocardiogram
(ECG) changes(i. e., ST segment elevations), and arrhythmia includes unstable heart
rates above 120/min or below 50/min.
7. Hypertrophic obstructive cardiomyopathy, constrictive cardiomyopathy, endomyocardial
fibroelastosis
8. Known severe congenital heart disease (such as uncorrected tetralogy of fallot or
transposition of the aorta)
9. Severe aortic or mitral stenosis or severe rheumatic mitral regurgitation.
10. Renal impairment (defined by creatinine >3 mg/dL) at screening or on any type of
dialysis.
11. Known hepatic impairment (total bilirubin >3mg/dl) or increased ammonia levels at
screening.
12. History of systemic lupus erythematous.
13. Stroke or TIA within 2 weeks from screening.
14. Women who are pregnant or lactating.
15. Allergy to organic nitrates.
16. History or presence of any other diseases (ie. Including malignancies or AIDS) with a
life expectancy of < 12 months
Locations and Contacts
Hatter Institute for Cardiovascular Research in Africa, Cape Town, Western Cape 7925, South Africa
Additional Information
Starting date: January 2013
Last updated: August 13, 2015
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