Bi Treatment With Hydralazine/Nitrates Versus Placebo in Africans Admitted With Acute Heart Failure (B-AHEF)

This study is currently recruiting participants. (see Contacts and Locations)
Verified March 2013 by University of Cape Town
Sponsor:
Collaborator:
Momentum Research, Inc.
Information provided by (Responsible Party):
Prof. Karen Sliwa-Hahnle, University of Cape Town
ClinicalTrials.gov Identifier:
NCT01822808
First received: March 25, 2013
Last updated: April 1, 2013
Last verified: March 2013
  Purpose

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.


Condition Intervention Phase
Acute Heart Failure
Left Ventricular Dysfunction
Drug: Hydralazine
Drug: Isosorbide Dinitrate
Phase 3

Study Type: Interventional
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

Resource links provided by NLM:


Further study details as provided by University of Cape Town:

Primary Outcome Measures:
  • 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


Secondary Outcome Measures:
  • 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.


Estimated Enrollment: 500
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)
Arms Assigned Interventions
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.
Drug: Hydralazine
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

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.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
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 heart failure signs by physical examination with at least 2 of the following: rales, oedema, elevated JVP, hepatomegaly, ascites
  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. Any intravenous treatment for heart failure, except IV furosemide (eg. IV inotropes, pressors, nitrates or nesiritide) at the time of screening.
  2. Systolic blood pressure <100 mmHg
  3. Plan for revascularization
  4. Greater than 48 hours after admission
  5. Reversible etiology of acute heart failure such as myocarditis, acute myocardial infarction, arrhythmia
  6. Hypertrophic obstructive cardiomyopathy, restrictive or constrictive cardiomyopathy, endomyocardial fibroelastosis
  7. Known severe congenital heart disease (such as uncorrected tetralogy of fallot or transposition of the aorta)
  8. Significant stenotic valvular disease
  9. Renal impairment (defined by creatinine >3 mg/dL) at screening or on any type of dialysis.
  10. Known hepatic impairment (total bilirubin >3mg/dl) or increased ammonia levels at screening.
  11. Acute coronary syndromes within 2 weeks from screening.
  12. Non-cardiac pulmonary oedema.
  13. Known sensitivity or intolerance to angiotensin converting enzyme (ACE) inhibitors.
  14. History of systemic lupus erythematosus.
  15. SEVERE Mitral valve rheumatic heart disease.
  16. Severe cerebrovascular disease, including acute stroke or cerebral ischaemia.
  17. Women who are pregnant or lactating.
  18. Allergy to organic nitrates.
  19. History or presence of any other diseases (ie. Including malignancies or AIDS) with a life expectancy of < 12 months
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01822808

Contacts
Contact: Karen Sliwa, PhD +27-21-4066358 karen.sliwa-hahnle@uct.ac.za
Contact: Lavinia Petersen 27722171166 lavinia.petersen@uct.ac.za

Locations
South Africa
Hatter Institute for Cardiovascular Research in Africa Recruiting
Cape Town, Western Cape, South Africa, 7925
Contact: Karen Sliwa, PhD    +27-21-4066358    karen.sliwa-hahnle@uct.ac.za   
Contact: Lavinia Petersen    +27-72-2171166    lavinia.petersen@uct.ac.za   
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         
Sponsors and Collaborators
University of Cape Town
Momentum Research, Inc.
Investigators
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.
  More Information

No publications provided

Responsible Party: Prof. Karen Sliwa-Hahnle, Professor, University of Cape Town
ClinicalTrials.gov Identifier: NCT01822808     History of Changes
Other Study ID Numbers: B-AHEF
Study First Received: March 25, 2013
Last Updated: April 1, 2013
Health Authority: South Africa: Medicines Control Council

Keywords provided by University of Cape Town:
acute heart failure
left ventricular dysfunction
hydralazine
isosorbide dinitrate

Additional relevant MeSH terms:
Heart Failure
Ventricular Dysfunction, Left
Ventricular Dysfunction
Heart Diseases
Cardiovascular Diseases
Hydralazine
Isosorbide-5-mononitrate
Isosorbide Dinitrate
Isosorbide
Antihypertensive Agents
Cardiovascular Agents
Therapeutic Uses
Pharmacologic Actions
Vasodilator Agents
Diuretics, Osmotic
Diuretics
Natriuretic Agents
Physiological Effects of Drugs
Nitric Oxide Donors
Molecular Mechanisms of Pharmacological Action

ClinicalTrials.gov processed this record on July 23, 2014