The objective of this study is to define the repeatability and reproducibility of quantifying
flow-mediated dilation (FMD) of the brachial artery (BA) using the AngioDefender (AD)
Repeatability will be assessed by repeat AD testing of the same subject 1 hour apart, using
the same AD device and operator.
Reproducibility will be assessed by comparing FMD scores obtained for the same subject, but
using different AD devices and operators.