Figure 4.

Cardiac interstitial collagen volume. Representative left ventricular sections (×20) of picrosirius red–stained myocardium from the left ventricle of each group are shown. Aged rats on the control diet had a modest but significant increase in interstitial collagen deposition compared with their younger counterparts on the same diet. This significant increase in collagen deposition in the aged group was reduced with fish oil supplementation. Results are shown as mean ± standard error of the mean. *p < .05 compared with young.