Figure 2.

Histological and echocardiographic analysis of hearts from adult HBuc/uc mice. (A and B) Hematoxylin-eosin staining of transverse sections through hearts of 12-wk-old mice at the papillary muscle level. Bar, 3 mm. (C and D) High magnification pictures. Sections were stained with Azan-Mallory. Massive fibrosis (blue stain) is present in 12-wk-old HBuc/uc heart throughout the vessel wall. Bar, 250 μm. (E and F) Echocardiographic analyses of hearts from WT (+/+) and HBuc/uc (uc/uc) mice. (E) Representative images of M-mode analyses are shown. Arrows indicate end-diastolic (d) and end-systolic (s) dimensions, respectively. (F) Physiological parameters of WT versus HBuc/uc hearts in 12-wk-old mice. HR, heart rate; sBP and dBP, systolic and diastolic blood pressure; LVDd and LVDs, left ventricular end diastolic and end systolic internal dimensions; FS, percent fractional shortening calculated as [(LVDd − LVDs)/LVDd] × 100. All values ± SEM.