Document Detail


Absence of enhanced sympathoadrenal activity and behaviorally evoked cardiovascular reactivity among offspring of hypertensives.
MedLine Citation:
PMID:  8695024     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To determine whether offspring of hypertensives show enhanced sympathetic nervous system activity, we evaluated several indices of sympathoadrenal activation and cardiovascular responsiveness to behavioral stimuli among 90 normotensive, young adult men having either one or two hypertensive parents (PH+(-), PH++) or normotensive parents only (PH--) (n = 30/group). Measurements included heart rate (HR) and blood pressure (BP) reactions to three mental stressors (the Stroop test, mental arithmetic, mirror tracing), a cold pressor test, postural adjustment (60 degrees upright tilt), isometric exercise and bicycle ergometry, as well as the 24-h excretion of catecholamines (epinephrine [E], norepinephrine [NE]) and venous plasma catecholamine concentrations, both at rest (seated and supine) and in response to the Stroop test and upright tilt. The three groups did not differ in age, education, body mass index (BMI), estimated aerobic fitness, resting HR, cardiac preejection period (PEP) and PEP:LVET (left ventricular ejection time) ratio, 24-h Na or K excretion, or fasting lipids, insulin or plasma renin activity. Resting systolic and diastolic BP varied as a function of parental hypertension, and were significantly higher in PH++ than among PH-- subjects (P < .05). No significant group difference was observed on any measure of plasma or urinary catecholamines, nor did offspring of hypertensives (PH++ or PH+-) showed greater HR or BP reactions than PH-- subjects to any of the several laboratory challenges. In sum, we find no evidence of enhanced sympathetic activity or heightened cardiovascular responsiveness among normotensive young adults who are familially predisposed to essential hypertension.
Authors:
S B Manuck; J M Polefrone; D F Terrell; M F Muldoon; A L Kasprowicz; S R Waldstein; R J Jennings; S B Malkoff; A Marsland; R E Graham
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  American journal of hypertension     Volume:  9     ISSN:  0895-7061     ISO Abbreviation:  Am. J. Hypertens.     Publication Date:  1996 Mar 
Date Detail:
Created Date:  1996-08-30     Completed Date:  1996-08-30     Revised Date:  2009-02-24    
Medline Journal Info:
Nlm Unique ID:  8803676     Medline TA:  Am J Hypertens     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  248-55     Citation Subset:  IM    
Affiliation:
Department of Psychology, University of Pittsburgh, PA 15260, USA.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adrenal Glands / physiology*
Adult
Behavior
Blood Pressure / physiology
Body Mass Index
Cardiovascular Physiological Phenomena*
Epinephrine / blood
Exercise / physiology
Family
Heart Rate
Humans
Hypertension / blood,  physiopathology*
Male
Norepinephrine / blood
Stress, Psychological
Sympathetic Nervous System / physiology*
Grant Support
ID/Acronym/Agency:
HL 40962/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
51-41-2/Norepinephrine; 51-43-4/Epinephrine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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