The Effect of Sonic Vibration on Isolated Human Iliac Arteries

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Abstract
Eighteen isolated human iliac arteries were exposed to vibrations of 25–1500 Hz for 6–30 h. The vibrations were produced in the nondistended arteries via an intracardiac phonocatheter with a reversed crystal connected to a sound generator via two band-pass filters. The frequencies were divided into four groups (25–30 Hz, 125–300 Hz, 400–500 Hz, and 800–1500 Hz). The last group had little effect on the elastic properties of the arteries. However, the other three groups made the arteries more distensible, with the 25–30 Hz group being most effective. The alteration appears dynamically to be in the elastin (initial slope) rather than the collagen (final slope) of the arterial wall. Nonvibrated control arteries did not change over the same time period.

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