A Dual-Chamber Pacemaker Is Surgically Placed in a Patient's Chest

question 2

Multiple Choice

A dual-chamber pacemaker is surgically placed in a patient's chest.Wires then carry pulses to the right atrium and the right ventricle.Why would the pulses be carried to the right chambers of the heart and not the left chambers?

• A)Because the right chambers are the natural pacemaker of the heart
• B)Because the right chambers of the heart are weaker and need more stimulation
• C)Because only the right chambers of the heart need to contract to move blood to the lungs
• D)Because it is easier to run the wires from the pacemaker through the vena cava
• E)Because once the right chambers are activated the pulse will be carried to the left chambers

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Definitions:

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A measure comparing the amount of energy available from a resource to the amount of energy used to obtain that resource.