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Hemodynamics and Arterial Properties in Response to Mental Stress in Individuals with Mild Hypertension

From College of Nursing, University of Florida, Gainesville, Florida 32610-0187.

View larger version (15K): [in a new window]   Fig. 1. Calculation of AI. AI is calculated as the difference between Ps and Pi (P), expressed as a percentage of the difference between Ps and Pd (PP). T is the time between the foot of the wave and the inflection point, which provides a measure of the travel time of the pressure wave to and from the major reflection site.

View larger version (42K): [in a new window]   Fig. 2. Changes in MBP in response to mental stress. NT: normotensives, MHT: mild hypertensives. *p < .001 vs. baseline, **p < .001 vs. SCWT.

View larger version (43K): [in a new window]   Fig. 3. Changes in PP in response to mental stress. *p < .001 vs. baseline; **p < .001 vs. SCWT.

View larger version (37K): [in a new window]   Fig. 4. Changes in HR in response to mental stress. *p < .001 vs. baseline; **p < .001 vs. SCWT.

View larger version (37K): [in a new window]   Fig. 5. Changes in arterial compliance in response to mental stress. *p < .05 vs. baseline.

View larger version (34K): [in a new window]   Fig. 6. Changes in PP amplification in response to mental stress. PPr/PPao: ratio of radial to aortic PP. *p < .05 vs. baseline; **p < .05 vs. SCWT.