Figure 1. Photomicrographs of immunohistochemical evaluation for iNOS in the heart observed in the tunica adventitia of intramyocardial vessels (→) in animals of groups R2 (A), R6 (B), and control (C) 400, and the evaluation of eNOS, showing diffuse expression in the groups R2 (D), R6 (E), and controls (F) 400.