The nurse clarifies that the master pacemaker of the heart is the:
a. left ventricle.
b. atrioventricular (AV) node.
c. sinoatrial (SA) node.
d. bundle of His.
Question 2
The nurse is aware that the muscle layer of the heart, which is responsible for the heart's contraction, is the:
a. endocardium.
b. pericardium.
c. mediastinum.
d. myocardium.