The nurse is reviewing the anatomy and physiology of the cardiac system with a patient scheduled for pacemaker insertion. Which chamber of the heart should the nurse instruct has the greatest workload and usually fails first as a result?
a. Left atrium
b. Right atrium
c. Left ventricle
d. Right ventricle
ANS: C
The thicker walls of the left ventricle pump with approximately five times the force of the right ventricle. This difference in force is due to the great difference between systemic and pulmonary blood pressure. A. B. D. These heart chambers do not have the same workload volume as the left ventricle.
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Fill in the blank(s) with correct word