Clinical and Prognostic Significance of Idiopathic Left Bundle-Branch Block in Young Adults

Figure 2

(a) and (b) Two males, aged 42 (a) and 48 (b) years, with idiopathic LBBB (a and b). In both cases, MRI shows late enhancement in the left posterior septum (arrows), possibly due to fibrosis involving the left bundle. Ao = aorta, RV and LV = right and left ventricles, respectively, RA and LA = right and left atria, respectively.

(a)

(b)