The nurse is helping a patient understand why the heart beat can change in speed. When doing so, what should the nurse explain as being the pacemaker of the heart?
a. Bundle of His
b. Sinoatrial node
c. Purkinje's fibers
d. Atrioventricular node
ANS: B
The sinoatrial (SA) node is a specialized mass of cardiac muscle that depolarizes rhythmically and most rapidly, about 100 times per minute, and therefore initiates each heartbeat. For this reason, the SA node is sometimes called the pacemaker of the heart. A. C. D. These structures are not considered the pacemaker of the heart.
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What information is most important for the nurse to provide to a patient being discharged after undergoing a digital fasciectomy?
A) Avoid flexing the fingers for 5 days after the surgery. B) Report symptoms of mild swelling to the surgeon. C) Bathe the hand once a day to avoid infection. D) Report unrelenting pain to the surgeon.
The primary care provider is considering adding a cephalosporin to the patient's medication reg-imen. Before initiating this therapy, the provider should determine if the patient has experienced an anaphylactic reaction to:
a. Sulfonamides b. Tetracyclines c. Penicillins d. Aminoglycosides
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Fill in the blank with the appropriate word.
In comparison with urban adults, rural adults:
a. seek medical care more often. b. have poorer overall health status. c. are less likely to identify a usual source of medical care. d. are usually seen by a specialist rather than a general practitioner.