Amlodipine Versus Valsartan for Improvement of Diastolic Dysfunction Associated With Hypertension

January 12, 2020 updated by: Duk-Hyun Kang, Asan Medical Center

Effect of Add-on of Amlodipine Versus Valsartan on Diastolic Dysfunction Associated With Hypertension

Hypertensive patients are at increased risk of developing LV hypertrophy and myocardial fibrosis, which cause diastolic dysfunction. Because the activation of rennin-angiotensin-aldosterone system (RAAS) has been shown to induce LV hypertrophy and myocardial fibrosis, the RAAS may play a central role in the pathogenic process from hypertension to diastolic HF. Inhibitors of RAAS have been considered as a treatment option for these patients, and the angiotensin receptor blockers (ARB) have been of interest because they antagonize the effects of angiotensin II more completely. However, the Irbesartan in Heart Failure with Preserved Systolic Function (I-PRESERVE) trial reported that treatment with irbesartan did not reduce the risk of death or hospitalization for cardiovascular causes among 4,128 patients who had HF with a preserved LV ejection fraction. The degree of improvement of diastolic dysfunction was associated with the extent of systolic blood pressure reduction, whether a RAAS inhibitor or non-RAAS blood pressure lowering was used. Amlodipine is a potent and well-tolerated calcium channel blocker, and seems to be appropriate for achieving more aggressive systolic blood pressure target and improving diastolic dysfunction in hypertensive patients, because amlodipine is clinically very useful for controlling systolic blood pressure. Assessment of diastolic function by echocardiography will be helpful to determine whether addition of amlodipine or an ARB to standard therapy is more beneficial to hypertensive patients with diastolic dysfunction. The investigators hypothesize that amlodipine added to standard therapy will be superior to valsartan in improving diastolic dysfunction by lowering systolic blood pressure more effectively in hypertensive patients, and try to examine this hypothesis in a prospective, open-label, randomized comparison study using blinded echocardiographic evaluation for end point.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Approximately half of hypertensive patients have diastolic dysfunction and diastolic dysfunction is associated with development of congestive heart failure and increased mortality. The Framingham study reported that 51% of patients with HF have a preserved left ventricular (LV) ejection fraction and hypertension is the strongest risk factor for HF with preserved ejection fraction, also termed diastolic heart failure. The rates of death and morbidity in these patients are as high as in patients with HF and a low LV ejection fraction. Hypertensive patients are at increased risk of developing LV hypertrophy and myocardial fibrosis, which cause relaxation abnormality and decreased compliance of LV with a rise in the LV diastolic pressure. Although diastolic HF associated with hypertension is a clinically significant problem, few clinical trials have been conducted and there is no proven pharmacological therapy to improve outcomes. Because the activation of rennin-angiotensin-aldosterone system (RAAS) has been shown to induce LV hypertrophy and myocardial fibrosis, the RAAS may play a central role in the pathogenic process from hypertension to diastolic HF. Inhibitors of RAAS have been considered as a treatment option for these patients, and the angiotensin receptor blockers (ARB) have been of interest because they antagonize the effects of angiotensin II more completely. However, the Irbesartan in Heart Failure with Preserved Systolic Function (I-PRESERVE) trial reported that treatment with irbesartan did not reduce the risk of death or hospitalization for cardiovascular causes among 4,128 patients who had HF with a preserved LV ejection fraction.

The degree of improvement of diastolic dysfunction was associated with the extent of systolic blood pressure reduction, whether a RAAS inhibitor or non-RAAS blood pressure lowering was used. The Systolic Blood Pressure Intervention Trial (SPRINT) compared the benefit of treatment of systolic blood pressure to a target of less than 120 mmHg with treatment to a target of less than 140 mmHg, and recently reported that targeting a systolic blood pressure of less than 120 mmHg, as compared with less than 140 mmHg, resulted in lower rates of fatal and nonfatal major cardiovascular events and all-cause death. Amlodipine is a potent and well-tolerated calcium channel blocker, and seems to be appropriate for achieving more aggressive systolic blood pressure target and improving diastolic dysfunction in hypertensive patients, because amlodipine is clinically very useful for controlling systolic blood pressure. Evaluating the effect of treatments on diastolic dysfunction has been limited by difficulties in non-invasive measure of LV diastolic pressure, but recent advances in echocardiography have made it possible to assess diastolic dysfunction accurately and reproducibly. Thus, assessment of diastolic function by echocardiography will be helpful to determine whether addition of amlodipine or an ARB to standard therapy is more beneficial to hypertensive patients with diastolic dysfunction. To the best of our knowledge, there has been no randomized trial to compare the effect of amlodipine versus an ARB on improving diastolic dysfunction in hypertensive patients. The investigators hypothesize that amlodipine added to standard therapy will be superior to valsartan in improving diastolic dysfunction by lowering systolic blood pressure more effectively in hypertensive patients, and try to examine this hypothesis in a prospective, open-label, randomized comparison study using blinded echocardiographic evaluation for end point.

Study Type

Interventional

Enrollment (Actual)

104

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Busan, Korea, Republic of
        • Busan Baik Hospital
      • Busan, Korea, Republic of
        • Busan University Hospital
      • Daejeon, Korea, Republic of
        • Chungnam University Hospital
      • Seoul, Korea, Republic of
        • Asan Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

38 years to 78 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Controlled hypertension: systolic BP < 150 and diastolic BP < 90 mmHg in persons aged 60 years or older, systolic BP < 140 and diastolic BP < 90 mmHg in persons 40 through 59 years according to the JNC 8th guideline
  • Evidence of diastolic dysfunction showing E/E' > 10
  • The patient agrees to the study protocol and the schedule of clinical and echocardiographic follow-up, and provides informed, written consent, as approved by the appropriate Institutional Review Board/Ethical Committee of the respective clinical site

Exclusion Criteria:

  • Unwillingness or inability to comply with the procedures described in this protocol
  • Planned cardiac surgery or planned major non-cardiac surgery within the study period.
  • Stroke or coronary revascularization in the past 6 months.
  • Clinically significant pulmonary disease.
  • Untreated hyperthyroidism, or hypothyroidism.
  • A diagnosis of cancer (other than superficial squamous or basal cell skin cancer) in the past 3 years or current treatment for the active cancer.
  • Female of child-bearing potential who do not use adequate contraception and women who are pregnant or breast-feeding
  • Any clinically significant abnormality identified at the screening visit, physical examination, laboratory tests, or electrocardiogram which, in the judgment of the Investigator, would preclude safe completion of the study.
  • LV ejection fraction < 50%.
  • Significant renal disease manifested by serum creatinine > 2.5 mg/dL
  • Hepatic disease or biliary tract obstruction, or significant hepatic enzyme elevation (ALT or AST > 3 times upper limit of normal).
  • History of intolerance to ARB or amlodipine.
  • Hypertrophic or restrictive cardiomyopathy.
  • Moderate or severe valvular disease.
  • Constrictive pericarditis
  • Atrial fibrillation with a heart rate > 120/min.
  • Sitting systolic BP < 100 mmHg

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Amlodipine
Amlodipine 2.5mg added to antihypertensive therapy
Experimental: Valsartan
Valsartan 40mg added to antihypertensive therapy

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Change in the ratio of E velocity (Early mitral inflow velocity) to E' velocity (Early mitral annular velocity)
Time Frame: 24 weeks
24 weeks

Secondary Outcome Measures

Outcome Measure
Time Frame
Change in systolic blood pressure
Time Frame: 24 weeks
24 weeks
Change in global LV longitudinal strain
Time Frame: 24 weeks
24 weeks
Change in LV mass
Time Frame: 24 weeks
24 weeks
Change in left atrial volume
Time Frame: 24 weeks
24 weeks
Change in clinical composite
Time Frame: 24 weeks
24 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Collaborators

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

December 1, 2016

Primary Completion (Actual)

January 6, 2020

Study Completion (Actual)

January 6, 2020

Study Registration Dates

First Submitted

November 22, 2016

First Submitted That Met QC Criteria

November 22, 2016

First Posted (Estimate)

November 25, 2016

Study Record Updates

Last Update Posted (Actual)

January 14, 2020

Last Update Submitted That Met QC Criteria

January 12, 2020

Last Verified

January 1, 2020

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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