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Illustration of the way to determine pressure-dependent (P-D) and pressure-independent (P-I) changes in arterial distensibility. The filled bar shows the decreased distensibility in the pathological model compared with the normotensive rat (white bar), whilst the hatched bar shows distensibility at a BP matched to the white bar: its recovered part is P-D stiffening and the remaining reduction is the P-I stiffening.
