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Venous Disease

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<strong>Venous</strong> Insufficiency<br />

Congenitally weak vein<br />

walls may dilate under<br />

normal pressures to<br />

cause secondary valve<br />

failure, or congenitally<br />

abnormal valves may be<br />

incompetent at normal<br />

superficial venous<br />

pressures.<br />

Normal veins and normal<br />

valves may become<br />

excessively distensible<br />

under the influence of<br />

hormones (as in<br />

pregnancy.

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