There was no significant difference in strain between the Achilles tendon and aponeurosis. In addition, no significant difference in strain was observed between the proximal and distal regions of the aponeurosis.
Arousals were five times more likely to occur after phenylephrine than after saline (58 vs. 12%; P = 0.0071). Phenylephrine administration produced heart rate slowing, indicative of baroreflex stimulation.