A nurse is teaching a cardiac patient about the ability of the heart to generate an electrical impulse. Which of the following teaching points should the nurse convey to the patient?
A) "There are many different parts of your heart that can initiate an electrical impulse."
B) "Electrical signals travel along the blood vessels that provide oxygen to your heart."
C) "Your heart depends on your brainstem to initiate electrical signals."
D) "The lining of your left ventricle is the site where electrical signals usually originate."
A
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Any part of the conduction system can spontaneously start an impulse, but the sinoatrial (SA) node normally has the fastest rate of automaticity and therefore the faster rate of spontaneous impulse formation. The SA node is located in the right atrium. The brain does not initiate the electrical signal. Conduction does not exclusively follow blood vessels.
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