slide1 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
INTRODUCTION PowerPoint Presentation
Download Presentation
INTRODUCTION

Loading in 2 Seconds...

play fullscreen
1 / 1

INTRODUCTION - PowerPoint PPT Presentation


  • 261 Views
  • Uploaded on

BLOOD PRESSURE DIFFERENCES DURING BODY POSITIONING TASKS IN HIGH AND LOW WORRYING WOMEN Michael M. Knepp, PhD. Maggie K. Mooney,& Bruce H. Friedman, PhD. INTRODUCTION METHOD (Laboratory) RESULTS

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'INTRODUCTION' - omer


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

BLOOD PRESSURE DIFFERENCES DURING BODY POSITIONING

  • TASKS IN HIGH AND LOW WORRYING WOMEN

Michael M. Knepp, PhD. Maggie K. Mooney,& Bruce H. Friedman, PhD.

INTRODUCTION

METHOD (Laboratory)

RESULTS

  • Epidemiologic studies show anxiety to be an independent risk factor for cardiovascular disease (CVD) (Haines et al., 1987; Kawachi et al., 1994a,b)
  • Anxiety in its clinical, trait, and state forms is associated with low cardiac vagal control, as indexed through heart rate variability (HRV) analysis (Friedman, 2007)
  • Worry may be a risk factor for CVD via its relation with perseveration and delayed CV recovery (Brosschot et al., 2006)
  • Longitudinal data indicate that social worry in men is associated with increased CVD risk (Kubzansky et al., 1997)
  • Dependent CV measures:
    • HR, low (0.04–0.15 Hz) and high (0.15–0.40 Hz) frequency HR spectral power, pre-ejection period (PEP), systolic and diastolic blood pressure (BP)
    • Electrocardiogram, Impedance cardiogram recorded with Ambulatory Monitoring System v4.4
    • BP recorded with IBS SD-700A automated monitor
  • Procedure
  • Task Epoch:
        • (1) Pretask Period: Watching a neutral stimulus video
        • (2) Task Period: One of two body positioning tasks
        • (3) Posttask Period: Sitting with eyes closed
  • Three-minute CV recording periods: baseline, task, and recovery plus initial anticipatory baseline upon arrival at lab
  • Task order counterbalanced within, but not across task sets
  • Tasks:
        • (1) Orthostatic Position: Standing upright with arms down at the side and eyes closed
        • (2) Supine Position: Lying down in a reclining chair near horizontal with eyes closed

Systolic Blood Pressure Across All Epochs

HYPOTHESES

  • Aim: to replicate the findings of Knepp and Friedman (2008)
  • Primary Hypotheses: High worriers will have
      • increased HR across all epochs
      • increased HR reactivity and recovery
  • Alternate Hypotheses: High worriers will have
      • decreased vagal tone and HRV across epochs
      • increased blood pressure to task
  • Exploratoryvariables: Included stroke volume and heather index from ICG

Diastolic Blood Pressure Reactivity/Recovery Change Scores

CONCLUSIONS

RESULTS

  • There were no significant findings for HR, rMSSD, LF, or HF spectral powers of ECG (all p values > .10).
  • There were no reactivity or recovery change score-based effects related to any of these ECG variables as well.
  • Systolic blood pressure:
    • Worry group by epoch interaction (F(6,288)=2.89, p<.01).
    • In all epochs, high worriers showed higher systolic blood pressure than low worriers.
    • The interaction takes place because this difference is more pronounced in the orthostatic and supine task phases.
  • Diastolic blood pressure:
    • There was a trend towards significance in the worry group by task epoch interaction (F (6, 288) =1.90, p=.081).
    • None of the individual epochs had significant differences except for a trend at supine baseline
    • The interaction was due to reactivity and recovery change differences benefiting good CV health in low worriers.
  • Benefits
    • Evidence for worry group differences in blood pressure supporting possible sympathetic and vascular influences rather than parasympathetic differences.
    • Matthews et al. (2004) found that the larger increases in blood pressure to stress tasks predicted earlier onset of hypertension.
  • Limitations
    • Findings applicable only to young adult women
    • Low temporal sensitivity may mask recovery findings
  • Implications & future studies
    • Cognitive trait impacting mechanical function such as body positioning
    • Use of clinical samples (Generalized anxiety disorder)
    • Replication in men and other age groups

METHOD (Online)

  • Recruitment phase
    • Subjects took part in an online screening phase using the Penn State Worry Questionnaire (PSWQ) in order to create low and high worry groups.
    • 785 women took the online screener of which 58 eligible undergraduate women came into the lab.
    • 31 women were considered to have high trait worry (PSWQ M=66.74, SE=1.00) and 27 women were low trait worriers (PSWQ M=37.67, SE=1.08).

Correspondence to: Kneppy@vt.edu

Presented at the 22nd Annual Meeting of the Association for Psychological Science, Boston, MA, May 2010