Pathophysiological Mechanisms of Hypertensive LVH:Optimising Regression - Full Text View

Sponsor:	University of Leeds
Collaborator:	The Leeds Teaching Hospitals NHS Trust
Information provided by:	University of Leeds
ClinicalTrials.gov Identifier:	NCT00518479

Purpose

Uncontrolled high blood pressure can cause heart muscle 'thickening', and this increases the likelihood of complications and death. The high blood pressure explains some but not all of this increase in heart size. This study will investigate the other causes, and will measure the heart muscle 'thickness' very accurately using the latest and most accurate technique called cardiac magnetic resonance imaging (MRI). The best way to treat this heart thickening remains to be determined. We hope to be able to show that by specifically targeting the cause of heart muscle thickening we can reduce its occurrence more effectively than by other standard means of blood pressure treatment

Condition	Intervention
Hypertension Left Ventricular Hypertrophy	Drug: Bendroflumethiazide 2.5mg OD; Amlodipine 10mg OD Drug: Valsartan 160mg OD; Moxonidine 400mcg OD

Study Type:	Interventional
Study Design:	Treatment, Randomized, Open Label, Active Control, Parallel Assignment, Efficacy Study
Official Title:	Pathophysiological Mechanisms of Hypertensive LVH:Optimising Regression

Resource links provided by NLM:

MedlinePlus related topics: High Blood Pressure

Drug Information available for: Moxonidine Amlodipine Bendroflumethiazide Valsartan

U.S. FDA Resources

Further study details as provided by University of Leeds:

Primary Outcome Measures:

The primary outcome measure is decrease in LV mass as assessed by cardiac MRI compared between the two treatment groups. [ Time Frame: 6 months ]

Enrollment:	42
Study Start Date:	September 2003
Study Completion Date:	April 2004

Arms	Assigned Interventions
1: Experimental Neurohormonal stimulatory arm	Drug: Bendroflumethiazide 2.5mg OD; Amlodipine 10mg OD
2: Experimental Neurohormonal inhibitory arm	Drug: Valsartan 160mg OD; Moxonidine 400mcg OD

Eligibility

Ages Eligible for Study:	25 Years to 80 Years
Genders Eligible for Study:	Both
Accepts Healthy Volunteers:	No

Criteria

Inclusion Criteria:

Recently diagnosed essential hypertension (within 6 months).
Age 25 to 80 years; Weight < 100kg.
Sinus rhythm without significant ventricular or atrial ectopy.

Exclusion Criteria:

Current angiotensin II receptor antagonist or ACE Inhibitor treatment.
Contra-indication to any of the protocol anti-hypertensive agents.
Angina requiring treatment with a Beta blocker or calcium antagonist
Any disease affecting the autonomic nervous system e.g. congestive cardiac failure, diabetes, neurological disease, malignancy, pregnancy.
Contraindication to MRI (pacemaker, intra-orbital debris, intra-auricular implants, intra-cranial clips, history of claustrophobia, inability to lie supine for 15 minutes etc).

Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: NCT00518479

Locations

United Kingdom, Wesst Yorkshire
Leeds Teaching Hospital NHS Trust
Leeds, Wesst Yorkshire, United Kingdom, LS1 3EX

Sponsors and Collaborators

University of Leeds

The Leeds Teaching Hospitals NHS Trust

Investigators

Principal Investigator:

John P Greenwood, MBChB, PhD, MRCP

Leeds University

More Information

Additional Information:

Cardiac MRI Research Group - Leeds, UK This link exits the ClinicalTrials.gov site

Publications:

Burns J, Sivananthan MU, Ball SG, Mackintosh AF, Mary DA, Greenwood JP. Relationship between central sympathetic drive and magnetic resonance imaging-determined left ventricular mass in essential hypertension. Circulation. 2007 Apr 17;115(15):1999-2005. Epub 2007 Mar 26.

Study ID Numbers:	PG/03/001
Study First Received:	August 17, 2007
Last Updated:	August 21, 2007
ClinicalTrials.gov Identifier:	NCT00518479 History of Changes
Health Authority:	United Kingdom: Medicines and Healthcare Products Regulatory Agency; United Kingdom: National Health Service; United Kingdom: Research Ethics Committee

Keywords provided by University of Leeds:

Hypertension
Left Ventricular Hypertrophy

Additional relevant MeSH terms:

Pathological Conditions, Anatomical
Hypertrophy, Left Ventricular
Heart Diseases
Molecular Mechanisms of Pharmacological Action
Sodium Chloride Symporter Inhibitors
Physiological Effects of Drugs
Diuretics
Vascular Diseases
Bendroflumethiazide
Cardiovascular Agents

Antihypertensive Agents
Pharmacologic Actions
Membrane Transport Modulators
Hypertrophy
Moxonidine
Natriuretic Agents
Therapeutic Uses
Cardiovascular Diseases
Cardiomegaly
Hypertension

ClinicalTrials.gov processed this record on November 22, 2009