Clinical trial NCT01944384: Impacts of Aldosterone Blockade on Myocardial Remodeling in Hypertensive Patients With Diastolic Failing Heart
Official title: Impacts of Aldosterone Blockade on Myocardial Remodeling in Hypertensive Patients With Diastolic Failing Heart
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE4
Conditions: Diastolic Heart Failure
Lead sponsor: National Taiwan University Hospital
Sponsor class: OTHER
First posted: 2013-09-17
Enrollment: 40
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: Aim of study: The effects of aldosterone blockade on myocardial remodeling in hypertensive patients with diastolic failing heart remains unclarified.

Background: Nearly half of patients with clinical heart failure (HF) have normal left ventricular ejection fraction (LVEF) who usually present with apparent diastolic dysfunction (DD) and are referred as diastolic HF (DHF). The renin-angiotensin-aldosterone system is an established major pathway that is operative in the pathogenesis of HF. The effects of aldosterone on myocardial hypertrophy, fibrosis and endothelial dysfunction have clearly been established in human and animal models. Furthermore, in these models, aldosterone antagonism prevented the development of myocardial fibrosis independent of its effect on blood pressure or myocardial hypertrophy. However, its application to patients with DHF is unspecified. In the study, we hypothesize that aldosterone blockade could reverse LV remodeling process in hypertensive patients with DHF.

Study protocol: We will enroll medically well-controlled hypertensive patients who have DHF defined as the presence of exertional dyspnea or HF signs/symptoms, diastolic dysfunction as impaired tissue-Doppler (TDI) derived mitral early annular diastolic velocity (\< 8 cm/s), and LVEF \> 50 % in echocardiography. All patients will be randomized to receive spironolactone 25 mg per day or not for at least 6 months. At baseline before randomization and 6 months after randomization, we will investigate the Quality-of-life (QOL) score by Minnesota Living with Heart Failure questionnaire (Chinese version), echocardiography coupled with TDI to assess the degree of LV hypertrophy, myocardial systolic and diastolic characteristics. Otherwise, we draw blood sampling at baseline and after randomization for quantifying and comparing several biomarkers which are currently proved to be correlated with LV hypertrophy, myocardial fibrosis, and biomechanical stretch in DHF patients, such as N-terminal pro-brain-type natriuretic peptide, matrix metalloproteinase-2, carboxy-terminal telopeptide, procollagen type III amino-terminal propeptide, soluble ST2, and galectin-3. Expected results: Aldosterone antagonism is effective for hypertensive patients with DHF by improving the quality of life, echo-derived myocardial function, and reducing ventricular mechanical stretch through lessening the degree of LV hypertrophy and myocardial fibrosis.

Detailed description: Aim of study: The effects of aldosterone blockade on myocardial remodeling in hypertensive patients with diastolic failing heart remains unclarified. Background: Nearly half of patients with clinical heart failure (HF) have normal left ventricular ejection fraction (LVEF) who usually present with apparent diastolic dysfunction (DD) and are referred as diastolic HF (DHF). Hypertensive heart disease occurs in the majority of patients with DHF, and several key aspects of heart failure secondary to hypertensive heart disease are the relatively highly prevalent LV hypertrophy, cardiac fibrosis, and endothelial dysfunction-mediated myocardial injury caused by changes in the local and systemic neurohormonal environment, and all of which are associated with LV diastolic dysfunction and tissue-Doppler derived systolic myocardial function. The renin-angiotensin-aldosterone system is an established major pathway that is operative in the pathogenesis of HF. The effects of aldosterone on myocardial hypertrophy, fibrosis and endothelial dysfunction have clearly been established in human and animal models. Furthermore, in these models, aldosterone antagonism prevented the development of myocardial fibrosis independent of its effect on blood pressure or myocardial hypertrophy. However, its application to patients with DHF is unspecified. In the study, we hypothesize that aldosterone blockade could reverse LV remodeling process in hypertensive patients with DHF.

Study protocol: We will enroll medically well-controlled hypertensive patients who have DHF defined as the presence of exertional dyspnea or HF signs/symptoms, diastolic dysfunction as impaired tissue-Doppler (TDI) derived mitral early annular diastolic velocity (\< 8 cm/s), and LVEF \> 50 % in echocardiography. All patients will be randomized to receive spironolactone 25 mg per day or not for at least 6 months. At baseline before randomization and 6 months after randomization, we will investigate the Quality-of-life (QOL) score by Minnesota Living with Heart Failure questionnaire (Chinese version), echocardiography coupled with TDI to assess the degree of LV hypertrophy, myocardial systolic and diastolic characteristics. Otherwise, we draw blood sampling at baseline and after randomization for quantifying and comparing several biomarkers which are currently proved to be correlated with LV hypertrophy, myocardial fibrosis, and biomechanical stretch in DHF patients, such as N-terminal pro-brain-type natriuretic peptide, matrix metalloproteinase-2, carboxy-terminal telopeptide, procollagen type III amino-terminal propeptide, soluble ST2, and galectin-3. Expected results: Aldosterone antagonism is effective for hypertensive patients with DHF by improving the quality of life, echo-derived myocardial function, and reducing ventricular mechanical stretch through lessening the degree of LV hypertrophy and myocardial fibrosis.

Eligibility criteria: Inclusion Criteria:

* well-controlled hypertensive patients with diastolic HF defined as the presence of diastolic dysfunction, normal LVEF (\> 50 %), and exertional dyspnea (≧ New York Heart Association functional class II) or other HF signs/symptoms fulfilled with the Framingham criteria despite optimal pharmacological therapy

Exclusion Criteria:

* secondary hypertension
* restrictive, constrictive or hypertrophic cardiomyopathy
* more than moderate (mitral or tricuspid regurgitant jet area/atrial area more than 20%; aortic regurgitant jet to the tip of the mitral valve leaflets) valvular heart diseases
* chronic atrial fibrillation
* usage of aldosterone antagonist within 3 months
* chronic pulmonary disease
* myocardial infarction within 3 months or active ischemia needing revascularization
* LVEF less than 50% by echocardiography
* renal failure (serum creatinine concentration more than 2.0 mg/dL).

Primary outcomes:
measure: peak myocardial velocity (Sm) during the ejection phase over the 6-basal segments
timeFrame: 6 months
Secondary outcomes:
measure: pro-brain natriuretic peptide (proBNP)
timeFrame: 6 months
measure: matrix metalloproteinase-2 (MMP-2)
timeFrame: 6 months
measure: matrix metalloproteinase-9 (MMP-9), etc.
timeFrame: 6 months
measure: carboxy-terminal telopeptide of collagen I(ICTP)
timeFrame: 6 months
measure: procollagen type III amino-terminal propeptide (PIIINP)
timeFrame: 6 months
measure: soluble ST2 receptor (sST2)
timeFrame: 6 months
Other outcomes:
Locations:
Study officials:
affiliation: NTUH
name: Wang Yi Chih, MD, PhD
role: PRINCIPAL_INVESTIGATOR
References: