what is the primary role of the sinoatrial sa node in the heart
Logo

Nursing Elites

HESI LPN

HESI PN Exit Exam

1. What is the primary role of the sinoatrial (SA) node in the heart?

Correct answer: A

Rationale: The correct answer is A: Pacemaker of the heart. The SA node, known as the natural pacemaker, initiates the electrical impulses that set the rhythm for the heartbeat. It is responsible for coordinating the heart's contractions by generating electrical signals at regular intervals. Choice B is incorrect as the SA node's primary function is not related to blood pressure regulation. Choice C is incorrect as the SA node does not cause electrical conduction delay but rather initiates and conducts the electrical impulses. Choice D is incorrect as the SA node does not directly stimulate muscle contraction but rather initiates the electrical events that lead to muscle contraction.

2. While ambulating in the hallway following an appendectomy yesterday, a client complains of chest tightness and shortness of breath. Which action should the nurse implement first?

Correct answer: C

Rationale: Having the client sit down in the hallway is the first action the nurse should implement. This is crucial to prevent further strain on the heart and to provide a safer environment for assessment and potential emergency intervention. Administering sublingual nitroglycerin (Choice A) may be appropriate later but should not precede ensuring the client's immediate safety. Assisting the client back to the room (Choice B) may not be advisable if the client is experiencing chest tightness and shortness of breath. Obtaining a 12-lead electrocardiogram (Choice D) is important but would not be the initial action to address the client's immediate symptoms.

3. A client is recovering from a right-sided mastectomy and is concerned about lymphedema. What should the nurse include in the discharge teaching to minimize this risk?

Correct answer: B

Rationale: The correct answer is B: Advise against lifting heavy objects with the affected arm. Lifting heavy objects with the affected arm can increase the risk of lymphedema. It is important for clients to avoid activities that strain the affected arm to minimize the risk of developing lymphedema. Choices A, C, and D are incorrect because wearing tight clothing on the affected arm, sleeping on the affected side, and frequent massage of the affected arm can potentially worsen lymphedema or impede the recovery process. Tight clothing can impede lymphatic flow, sleeping on the affected side can restrict circulation, and frequent massage can exacerbate swelling in the arm.

4. The nurse is assisting with the admission of a young adult female Korean exchange student with acute abdominal pain. Although the client has been able to easily answer questions, when asked about sexual activity, she looks away. What action should the nurse take?

Correct answer: D

Rationale: Observing the client's response to another question is the most appropriate action in this scenario. By doing so, the nurse can assess whether the client's discomfort is due to cultural sensitivity or a misunderstanding. This approach allows the nurse to proceed with sensitivity and respect, ensuring effective communication. Option A is incorrect because omitting the section of the assessment form may result in missing crucial information relevant to the client's condition. Option B jumps to assumptions about a language barrier without confirming it first. Option C focuses on rewording the question without addressing the underlying issue causing the client's discomfort, which may not necessarily be due to a lack of understanding.

5. The nurse is assigned to administer medications in a long-term care facility. A disoriented resident has no identification band or picture. What is the best nursing action for the nurse to take prior to administering the medications to this resident?

Correct answer: A

Rationale: In a long-term care facility, when a disoriented resident lacks identification, it is crucial to confirm the resident's identity before administering medication to prevent errors. Asking a regular staff member who is familiar with the resident to confirm their identity is the best course of action. This ensures accuracy and safety in medication administration. Holding the medication until a family member can confirm the identity could delay necessary treatment. Re-orienting the resident is important for their well-being but does not address the immediate medication safety concern. Confirming room and bed numbers, though important for administration logistics, does not verify the resident's identity.

Similar Questions

When administering an analgesic to a client with low back pain, which intervention should the practical nurse implement to promote the effectiveness of the medication?
A client is post-operative day one following an open cholecystectomy. The nurse notices the client's drainage from the T-tube is dark green. What is the most appropriate action for the nurse to take?
When reinforcing diet teaching for a client diagnosed with hypokalemia, which foods should the PN encourage the client to eat? Select All That Apply
During the last 30 days, an elderly client has exhibited a progressively decreasing appetite, is spending increasing amounts of daytime hours in bed, and refuses to participate in planned daytime activities. Which action should the practical nurse take?
At what age does a 9-year-old child typically lose which of the following teeth?

Access More Features

HESI LPN Basic
$69.99/ 30 days

  • 5,000 Questions with answers
  • All HESI courses Coverage
  • 30 days access

HESI LPN Premium
$149.99/ 90 days

  • 5,000 Questions with answers
  • All HESI courses Coverage
  • 30 days access

Other Courses