Sorry, there is no quick answer. Brachial artery reactivity testing is an assessment of endothelial function. There is variability and lack of standardization in protocol, reading, and outcomes. Essentially, the values are reported as a change in vessel diameter from resting state and post reactive hyperemia. Values are compared between individuals in a group- diabetics, etc. I invite you reveiw the ASE practice guidelines and there is lots of information on PubMed.
Many factors effect endothelial function and vasodilation, including fatty meals. All of our studies are performed in the fasting state.
Connie McCoy, RVT
Cincinnati Children's Hospital
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