After reviewing an electrocardiogram, the nurse determines that an electrical impulse originated in a patient's sinoatrial (SA) node with a P wave. What does this represent?

Atrial depolarization

Atrial repolarization

Ventricular depolarization

Ventricular repolarization

Answer and Explanation

The Correct Answer is A

A.   The P wave on an ECG represents atrial depolarization, which occurs as the electrical impulse originates in the sinoatrial (SA) node and spreads through the atria, initiating atrial contraction.
B.   Atrial repolarization typically occurs during the QRS complex and is not represented by the P wave. Atrial repolarization is masked by the larger QRS complex.
C.   Ventricular depolarization is represented by the QRS complex on an ECG, as the electrical impulse spreads through the ventricles, leading to ventricular contraction.
D.   Ventricular repolarization typically occurs during the T wave and is not represented by the P wave. Ventricular repolarization involves the recovery of ventricular muscle cells after contraction.

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Correct Answer is C

Explanation

A. Jaundice is typically not visible in the webbed areas of the fingers.

B. The nail beds are part of the skin that can show jaundice, but they may also be aﬀected by other factors such as anemia, cyanosis, or nail polish.
C. The hard palate is a part of the oral mucosa that can show jaundice, especially in clients with dark skin tones.
D. This is not an area that the nurse should inspect to monitor for the presence of jaundice in a client who is African American and has cholecystitis. The skin can show jaundice, but it may be difficult to detect in clients with dark skin tones.

A. Liver disease B. Lupus C. Pneumonia D. Renal disease

Correct Answer is C

Explanation

A. While a splenectomy can lead to increased workload on the liver, it does not directly predispose the patient to liver disease.
B. A history of splenectomy does not specifically increase the risk of lupus.

C. Patients who have undergone splenectomy are at increased risk of certain infections, particularly encapsulated bacteria such as Streptococcus pneumoniae, which can cause pneumonia.
D. A history of splenectomy does not directly increase the risk of renal disease.

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After reviewing an electrocardiogram, the nurse determines that an electrical impulse originated in a patient's sinoatrial (SA) node with a P wave. What does this represent?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is collecting data from a client who is African American has cholecystitis. Which of the following areas should the nurse inspect to monitor for the presence of jaundice?

Correct Answer is C

Explanation

The nurse is taking a health history and notes the patient has a history of a splenectomy. For which condition is this patient at risk?

Correct Answer is C

Explanation

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