The Renin-Angiotensin System in Essential Hypertension

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00141583
Recruitment Status : Terminated (Insufficient accrual rate)
First Posted : September 1, 2005
Last Update Posted : June 9, 2015
Information provided by:
St George's, University of London

Brief Summary:
Although ACE Inhibitors and Angiotensin Receptor Blockers are effective blood pressure lowering agents, the exact mechanisms by which these agents lower BP are still not fully understood. This study aims to compare the blood pressure and hormonal responses (plasma renin activity and aldosterone) to the ACE inhibitor enalapril and ARB candesartan in individuals with mild essential hypertension.

Condition or disease Intervention/treatment Phase
Hypertension Drug: Enalapril 20 mg bd Drug: Candesartan 8 mg bd Not Applicable

Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 11 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Official Title: The Renin-Angiotensin System in Essential Hypertension
Study Start Date : April 2004
Actual Study Completion Date : October 2006

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Change in BP
  2. Change in PRA and aldosterone

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Essential Hypertension
  • SBP 140-159 mmHg
  • DBP 90-99 mmHg

Exclusion Criteria:

  • Intolerance of or allergy to ACE Inhibitors or ARBS
  • Pregnant or Breastfeeding
  • Pre-menopausal women
  • Uncontrolled cardiac or renal failure
  • Diabetes mellitus

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00141583

United Kingdom
Blood Pressure Unit, Dept. Cardiac & Vascular Sciences, SGUL
London, United Kingdom, SW17 0RE
Sponsors and Collaborators
St George's, University of London
Principal Investigator: Timothy WR Doulton, BSc MRCP SGUL Identifier: NCT00141583     History of Changes
Other Study ID Numbers: LREC 01.87.10
First Posted: September 1, 2005    Key Record Dates
Last Update Posted: June 9, 2015
Last Verified: May 2007

Keywords provided by St George's, University of London:
Renin-angiotensin system
ACE Inhibitor
Angiotensin Receptor Blocker

Additional relevant MeSH terms:
Vascular Diseases
Cardiovascular Diseases
Antihypertensive Agents
Angiotensin II Type 1 Receptor Blockers
Angiotensin Receptor Antagonists
Molecular Mechanisms of Pharmacological Action
Angiotensin-Converting Enzyme Inhibitors
Protease Inhibitors
Enzyme Inhibitors