A.  The width of the QRS complexes in LBBB is __________ seconds in duration.

a. 0.08–0.10 b. 0.10–0.12

c. equal to or greater than 0.12 d. less than 0.12

B. QRS complex configuration in LBBB in leads V5 and V6 is

a. wide and slurred or notched

b. triphasic.

c. wide and deflecting negatively.

d. narrow and deflecting positively.

C.  Describe the expected direction the ST segment and T waves  take in BBB.

D.  Fascicular blocks

a. cause axis deviation.

b. result from accessory pathways between the atria and ventricles.

c. result in R waves being superimposed on the other.

d. lead to a complete absence in conduction below the level of block.