Figure 4. Relationship of baseline diameter to bloodflow, shear rate and FMD.

A, baseline diameter versus peak shear rate demonstrating an inverse relationship. B, baseline diameter versus peak flow demonstrating a direct relationship. C, baseline diameter versus peak FMD response demonstrating an inverse relationship. Data from reactive hyperaemia tests performed on 8 healthy subjects (2 tests on 2 separate days) from the data set published in Pyke et al. (2004).