Fig. 1.
Fig. 1. Brachial artery diameter variations in response to hyperemia. / Evaluation of changes in arterial diameter in response to hyperemia in patients (SS) and controls (AA). Brachial artery diameter was determined using an echo-tracking system before and after a hyperemia test, as described in “Patients, materials, and methods.” (A) The change in diameter, which is the difference (DM − DB) expressed in micrometers, where DM is the maximum diameter following hyperemia and DB the baseline diameter. (B) The FMD, which is calculated as the ratio 100(DM − DB)/DB. *, P < .01.

Brachial artery diameter variations in response to hyperemia.

Evaluation of changes in arterial diameter in response to hyperemia in patients (SS) and controls (AA). Brachial artery diameter was determined using an echo-tracking system before and after a hyperemia test, as described in “Patients, materials, and methods.” (A) The change in diameter, which is the difference (DM − DB) expressed in micrometers, where DM is the maximum diameter following hyperemia and DB the baseline diameter. (B) The FMD, which is calculated as the ratio 100(DM − DB)/DB. *, P < .01.

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