Examining the brachial artery reactivity curve measured by B-mode ultrasound in the Buffalo Cardio-metabolic Occupational Police Stress (BCOPS) pilot study
Joseph, Parveen Nedra
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Brachial artery reactivity, and carotid artery intima-media thickness (CIMT) were assessed using B-mode ultrasound. The artery was scanned continuously for 8 minutes (1 minute of baseline, 4 minutes of cuff inflation at 40mmHg above systolic, 3 minutes after cuff release). Analytic sample (n = 78; 43 male, 35 female) consisted of active duty Police officers in the BCOPS pilot study. Means and standard deviations (SD) stratified by gender, Pearson's correlations between brachial variables and CIMT were calculated. Arterial diameters significantly differed (p < 0.001) between men and women. Peak arterial dilation following cuff release was reached 50.77 ± 21.97 seconds (49.67 ± 20.22 cardiac cycles) in men and 44.66 ± 24.07 seconds (44.57 ± 20.36 cardiac cycles) in women. Mean common carotid artery (CCA) IMT and mean maximum IMT were significantly correlated (p < 0.01) in men (r = 0.691) and women (r = 0.450). Brachial reactivity measures were inversely correlated with CHAT in women, but positively correlated in men.