Ignite Creation Date:
2024-05-05 @ 11:22 AM
Last Modification Date:
2024-10-26 @ 9:04 AM
Study NCT ID:
NCT00005200
Status:
COMPLETED
Last Update Posted:
2016-02-18
First Post:
2000-05-25
Brief Title:
Adolescent Blood Pressure Variation and Ventricular Mass
Sponsor:
National Heart Lung and Blood Institute NHLBI
Organization:
National Heart Lung and Blood Institute NHLBI
Study Overview
Official Title:
None
Status:
COMPLETED
Status Verified Date:
2000-04
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
To evaluate possible early neurogenic influence in essential hypertension by monitoring heart growth in adolescents over a two year interval
Detailed Description:
BACKGROUND
Evidence has accumulated suggesting that essential hypertension begins early in life and is potentially preventable One possible pathogenetic mechanism implicated is a sympathetic nervous system abnormality which is manifested by increased sympathetic drive to the heart An elevated sympathetic nervous system tone and decreased vagal inhibition is responsible for the hyperkinetic circulation seen in a significant proportion of persons with borderline essential hypertension Exaggerated blood pressure and heart rate responses to mental stressors have been documented in normotensive children of hypertensive parents These changes appear to involve sympathetic over-responding to fight-flight stimuli
Increased blood pressure variability induced by stress might accelerate vascular and other changes leading to essential hypertension Behavior and environment might chronically elevate sympathetic nervous system tone with damaging cardiovascular consequences Stressful working conditions defective anger management and poor interpersonal problem solving skills have been implicated in studies of stress-induced blood pressure increases These influences may interact with diet and genetic risk to exacerbate pathophysiology Essential hypertension risk might be reduced by modifying working and living environments and by training young persons at risk to cope with or avoid stressors that elicit defensive over-responding
DESIGN NARRATIVE
This longitudinal study tested two different models of sympathetic nervous system influence on the early pathophysiology of essential hypertension The first neurogenic model was evaluated by determining whether an excessively variable or reactive blood pressure in year 1 gave rise to excessive heart growth or left ventricular hypertrophy over a two year follow-up The second neurogenic model was evaluated by determining if higher blood pressure exacerbated by personality stress and dietary sodium intake led to increased left ventricular hypertrophy at follow-up
All ninth-graders entering two large Baltimore high schools in year 1 and year 2 of the study were screened to yield the 240 subjects in the cohort Initial screening included data on blood pressure height weight health habits personality medical history and health care utilization Baseline exam included data on basal blood pressure aerobic exercise stress cognitive stress interpersonal stress ambulatory blood pressure echocardiogram physical activity and Type A personality The parents were also interviewed to assess family blood pressure status health history health care utilization and dietary habits including sodium intake Students were re-examined at twelve and 24 months
The study completion date listed in this record was obtained from the End Date entered in the Protocol Registration and Results System PRS record
Evidence has accumulated suggesting that essential hypertension begins early in life and is potentially preventable One possible pathogenetic mechanism implicated is a sympathetic nervous system abnormality which is manifested by increased sympathetic drive to the heart An elevated sympathetic nervous system tone and decreased vagal inhibition is responsible for the hyperkinetic circulation seen in a significant proportion of persons with borderline essential hypertension Exaggerated blood pressure and heart rate responses to mental stressors have been documented in normotensive children of hypertensive parents These changes appear to involve sympathetic over-responding to fight-flight stimuli
Increased blood pressure variability induced by stress might accelerate vascular and other changes leading to essential hypertension Behavior and environment might chronically elevate sympathetic nervous system tone with damaging cardiovascular consequences Stressful working conditions defective anger management and poor interpersonal problem solving skills have been implicated in studies of stress-induced blood pressure increases These influences may interact with diet and genetic risk to exacerbate pathophysiology Essential hypertension risk might be reduced by modifying working and living environments and by training young persons at risk to cope with or avoid stressors that elicit defensive over-responding
DESIGN NARRATIVE
This longitudinal study tested two different models of sympathetic nervous system influence on the early pathophysiology of essential hypertension The first neurogenic model was evaluated by determining whether an excessively variable or reactive blood pressure in year 1 gave rise to excessive heart growth or left ventricular hypertrophy over a two year follow-up The second neurogenic model was evaluated by determining if higher blood pressure exacerbated by personality stress and dietary sodium intake led to increased left ventricular hypertrophy at follow-up
All ninth-graders entering two large Baltimore high schools in year 1 and year 2 of the study were screened to yield the 240 subjects in the cohort Initial screening included data on blood pressure height weight health habits personality medical history and health care utilization Baseline exam included data on basal blood pressure aerobic exercise stress cognitive stress interpersonal stress ambulatory blood pressure echocardiogram physical activity and Type A personality The parents were also interviewed to assess family blood pressure status health history health care utilization and dietary habits including sodium intake Students were re-examined at twelve and 24 months
The study completion date listed in this record was obtained from the End Date entered in the Protocol Registration and Results System PRS record
Study Oversight
Has Oversight DMC:
Is a FDA Regulated Drug?:
Is a FDA Regulated Device?:
Is an Unapproved Device?:
Is a PPSD?:
Is a US Export?:
Is an FDA AA801 Violation?:
Secondary IDs
| Secondary ID | Type | Domain | Link |
|---|---|---|---|
| R01HL036298 | NIH | None | httpsreporternihgovquickSearchR01HL036298 |