Maturational Changes in Cardiac Structures -- Blood Pressure Relationship -- SCOR in Hypertension

This study has been completed.
Sponsor:
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier:
NCT00005469
First received: May 25, 2000
Last updated: June 23, 2005
Last verified: May 2000
  Purpose

To examine a school-based population of children for maturational changes in blood pressure and cardiac structures.


Condition
Cardiovascular Diseases
Heart Diseases
Hypertension

Study Type: Observational

Resource links provided by NLM:


Further study details as provided by National Heart, Lung, and Blood Institute (NHLBI):

Study Start Date: September 1990
Estimated Study Completion Date: November 1996
Detailed Description:

BACKGROUND:

Although excessive left ventricular mass has been viewed as an adaptation to increased blood pressure, it can precede the rise in blood pressure in hypertensive models. Excessive growth of the heart may reflect additional factors contributing to eventual level of blood pressure. In children, rapid heart growth may be predictive of subsequent high childhood blood pressure level and greater incidence of cardiovascular disease in adult relatives. These studies had the potential of defining maturational changes in known risk factors which might help predict future hypertensive disease.

The study was a subproject within a Specialized Center of Research (SCOR) in Hypertension. The Request for Applications for the SCOR was released in October, 1988.

DESIGN NARRATIVE:

A total of 124 prepubertal males and females were followed longitudinally for five years. Yearly examinations defined the stages of sexual maturation. On four occasions each year, subjects were studied for resting and ambulatory blood pressure, echocardiography, anthropometry and activity assessment. Once yearly, each subject had blood drawn for hormone analyses and whole blood viscosity estimate. From these data, growth velocities of the heart and rate of change of blood pressure were determined. These parameters were analyzed to determine if rapid growth of the heart preceded or followed the rise in blood pressure observed during puberty and body size and composition, sexual maturation and hormone changes, and sympathetic activity.

The study was a subproject within a SCOR in Hypertension. Approximately 7 percent of total dollars were awarded for this subproject.

  Eligibility

Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No
Criteria

No eligibility criteria

  Contacts and Locations
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No Contacts or Locations Provided
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00005469     History of Changes
Other Study ID Numbers: 4914
Study First Received: May 25, 2000
Last Updated: June 23, 2005
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Hypertension
Cardiovascular Diseases
Heart Diseases
Vascular Diseases

ClinicalTrials.gov processed this record on September 18, 2014