Arterial Hypertrophy

Medial hypertrophy. Courtesy of A. Jefferies

Occurs as a response to increased arterial blood pressure and increased load on the vessels. The elastic layers of the intima and the media increase in size.

Typically seen in the pulmonary vessels of cats with Aelurostrongylus abstrusus infection. The pneumonia regresses and leaves behind the hypertrophied pulmonary arteries which are clinically insignificant.