Correct Answer: D

Rationale: After an acute myocardial infarction, it is important to involve the client in cardiac rehabilitation to help them recover and manage their condition effectively. Performing an ECG every 12 hours is not necessary unless there are specific indications for it. Placing the client in a supine position may not be ideal as it can increase venous return, potentially worsening cardiac workload. Drawing troponin levels every 4 hours is excessive and not recommended as troponin levels usually peak within 24-48 hours post-MI and then gradually decline.

Correct Answer: C

Rationale: The correct answer is C: Tachycardia. Tachycardia is a common sign of dehydration because the body tries to compensate for the reduced fluid volume by increasing the heart rate. Bradycardia (choice A) is not typically seen in dehydration as the body tries to maintain perfusion. Increased skin turgor (choice B) is actually a sign of dehydration, but tachycardia is a more specific finding. A bounding pulse (choice D) is associated with conditions like hyperthyroidism or aortic regurgitation, not dehydration.

Correct Answer: C

Rationale: Obtaining arterial blood gases is a crucial nursing action when caring for a client with an arterial line. This procedure helps assess the client's oxygenation status and acid-base balance accurately. Leveling the transducer with the client's phlebotomy site (A) is important for accurate pressure measurements, but it is not the primary action in this scenario. Flushing the arterial line every 8 hours (B) is a routine maintenance procedure and not the immediate priority. Keeping the client's hand elevated above the heart level (D) is a good practice to prevent swelling, but it is not directly related to the arterial line care in this case.

Correct Answer: C

Rationale: The correct first action for the nurse to take after realizing that the wrong medication has been administered to a client is to monitor vital signs. Monitoring vital signs is crucial as it allows the nurse to promptly assess for any immediate adverse effects that may result from the wrong medication. This immediate assessment is essential for ensuring the client's safety and well-being. Notifying the provider (choice A) and reporting the incident to the nurse manager (choice B) are important steps to take, but they should come after ensuring the client's immediate safety. Filling out an incident report (choice D) is also necessary but should be done after addressing the client's immediate needs.

Correct Answer: B

Rationale: The correct answer is B: Ataxia. Ataxia, which refers to uncoordinated movements, is a common adverse effect of phenytoin, a medication used to manage seizure disorders. Bradycardia (Choice A) is not typically associated with phenytoin; instead, it may cause tachycardia (Choice C) as a side effect. Insomnia (Choice D) is not a common adverse effect of phenytoin.