Left ventricular regional contraction abnormalities by echocardiographic speckle tracking in combined right bundle branch with left anterior fascicular block compared to left bundle branch block.

•Patients with RBBB+LAFB demonstrate echocardiographic wall motion abnormalities between inferior and anterior LV walls, similar to abnormalities found between septal and lateral LV walls in patients with LBBB.•Fewer patients with RBBB+LAFB showed a classical pattern of opposing wall motion compared to LBBB.•LV scar and coexisting block of the central fascicle might alter strain patterns.