The proposed research involves two goals: identification and verification of non-invasive outcome measures that reflect autonomic nervous system activity and verification of the role of the sympathetic nervous system (SNS) in the maintenance of primary hypertension. The design is a form of the time series experiment with the introduction of three experimental variables sequentially that are expected to increase or decrease sympathetic activity. Sympathetic nerve discharge will be measured directly and will serve as the """"""""gold standard"""""""" for non-invasive measures of SNS activity (i.e., blood pressure, heart rate, galvanic skin resistance, peripheral skin temperature, pupil size, frontalis muscle activity, and catecholamine levels). Two groups of female subjects will be studied: healthy normotensives and those with primary (essential) hypertension. Receiver Operating Characteristic (R0C) Curves will be generated to display the sensitivity and specificity of each of the indirect measures of SNS activity. Based on the relationship between SNS activity and blood pressure, it will be possible to identify a group of hypertensive subjects in which the SNS is involved in the maintenance of hypertension. Such patients are much more likely to respond to pharmacologic and non-pharmacologic therapy which addresses the overactivity of the SNS than are other hypertensive patients.

Agency
National Institute of Health (NIH)
Institute
National Institute of Nursing Research (NINR)
Type
Academic/Teacher Award (ATA) (K07)
Project #
1K07NR000065-01A2
Application #
2256601
Study Section
National Institute of Nursing Research Initial Review Group (NRRC)
Project Start
1995-09-01
Project End
1998-08-31
Budget Start
1995-09-01
Budget End
1996-08-31
Support Year
1
Fiscal Year
1995
Total Cost
Indirect Cost
Name
University of Colorado Denver
Department
Type
Schools of Nursing
DUNS #
065391526
City
Aurora
State
CO
Country
United States
Zip Code
80045
Yucha, C B; Clark, L; Smith, M et al. (2001) The effect of biofeedback in hypertension. Appl Nurs Res 14:29-35
Yucha, C B (2000) Use of microneurography to evaluate sympathetic activity in hypertension: a brief review. Appl Psychophysiol Biofeedback 25:55-63