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. Author manuscript; available in PMC: 2013 Sep 30.
Published in final edited form as: Cell Biochem Funct. 2011 Mar 29;29(4):272–278. doi: 10.1002/cbf.1745

Figure 2.

Figure 2

(A) The experimental timeline for the entire study protocol is shown. Subjects rested for 5 min and then underwent baseline reactive hyperaemia testing for 16 min. Following another 5-min rest, subjects underwent three mental stress tasks, another 5 min of rest, and the post-stress reactive hyperaemia test. (B) The experimental timeline for the reactive hyperaemia test is shown. Baseline measurements are taken for 5 min with both the BIOPAC arm cuff and the EndoPAT finger cuffs inflated to 70 mmHg. The BIOPAC cuff is then inflated from 70 mmHg to 220 mmHg to occlude the experimental arm for 5 min. The BIOPAC cuff is then released back down from 220 mmHg to 70 mmHg to allow for 6 min of post-occlusion measurements with both the BIOPAC and EndoPAT cuffs. (C) The experimental timeline for the mental stress testing is shown. Each of the three mental stress tasks (Stroop colour word test, mental arithmetic test, and spiral omnibus test) is performed for 6 min with 5-min rest periods between each task. Blood pressure (BP) and heart rate (HR) measurements taken by the digital automated blood pressure cuff are indicated by the arrows and are taken at the beginning, 2 min into, and at the end of each mental stress task.