Skip to main content

Table 3 Effect of Mental Stress on Carotid Artery Vascular Response

From: Cerebrovascular mental stress reactivity is impaired in hypertension

Variable Normal (N = 20) Hypertensive (N = 28)  
  Baseline Peak P-value Baseline Peak P-value P-value Normo v. Hyper
Systolic BP 118.2 ± 12.5 131.3 ± 22.1 0.0035 140.0 ± 22.2 155.3 ± 29.2 <.0001 0.5849
Diastolic BP 72.6 ± 9.7 78.5 ± 10.6 0.0029 82.2 ± 16.2 92.1 ± 18.2 <.0001 0.1241
Mean BP 87.6 ± 9.1 96.2 ± 11.4 0.0003 100.8 ± 16.5 113.7 ± 19.9 <.0001 0.2477
Heart Rate 69.1 ± 12.1 80.1 ± 16.6 <.0001 66.4 ± 12.6 77.4 ± 14.4 <.0001 0.9933
CA Diam 0.63 ± 0.06 0.66 ± 0.07 0.0001 0.69 ± 0.06 0.68 ± 0.07 0.0633 <.0001
PSV 72.2 ± 15.6 75.8 ± 13.2 0.1196 74.2 ± 17.9 70.2 ± 17.4 0.162 0.0495
EDV 19.2 ± 6.0 21.2 ± 5.0 0.0341 22.1 ± 5.7 22.0 ± 8.2 0.5868 0.0841
TAM 18.5 ± 4.9 22.7 ± 6.2 0.0008 19.6 ± 5.1 20.6 ± 8.8 0.4529 0.0764
RI 0.73 ± 0.08 0.72 ± 0.08 0.113 0.81 ± 0.23 0.74 ± 0.18 0.1574 0.338
PI 1.73 ± 0.60 1.51 ± 0.41 0.0581 1.95 ± 0.96 1.61 ± 0.81 0.0471 0.8033
Flow 351.4 ± 113.6 453.6 ± 136.2 <.0001 444.2 ± 142.9 458.1 ± 194.8 0.5851 0.0136
  1. Values are mean ± SD. Numbers in brackets represent number of participating subjects in each group. Data represents the effects of the mental stress task that produced the maximum increase in blood flow in the three groups. PSV, peak systolic velocity; EDV, end-diastolic velocity; TAM, time average mean velocity; RI, resistive index; PI, pulsatility index; TAM, time averaged mean velocity. Flow = 3.14× 60× (radius) TAM. Units same as in Tables 1 and 2.