A. Leads __________ are referred to as the precordial leads.

a. MCL1 and MCL6

b. aVR, aVL, and aVF

c. I and II

d. V1, V2, V3, V4, V5, and V6

B.  Match the following ECG leads with the correct description.

C. Contiguous ECG leads

a. include any two standard limb leads.

b. include any two leads that are anatomically next to one another.

c. are also called anteroseptal leads.

d. are those that view the heart from a superior direction.

D. Describe how to analyze a 12-lead ECG tracing.

E.  The currents produced by depolarization and repolarization of the cardiac cells are called

a. mean vectors.

b. instantaneous vectors.

c. the mean electrical axis.

d. positive deflections.