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Figure 2 Percentage brachial artery diameter changes before and immediately after ultrasound (US) exposure in different time durations. There is significant vasodilation after 2, 3, and 5 min of ultrasound exposure compared with the baseline values. Images of the brachial artery were digitized and measured using the Vericis Echo Review application (Camtronics Medical Systems, Hartland, Wisconsin). The R-wave of the electrocardiogram was used to time the measurements of vascular diameter. *p < 0.01;  p < 0.001; mean ± SEM (%), n = 10.
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