The nurse is caring for a client admitted with unstable angina. The laboratory result for the initial troponin I is elevated in this client. The nurse should recognize what implication of this assessment finding?

This result indicates muscle injury but does not specify the source.

Because the client has a history of unstable angina, this is a poor indicator of myocardial injury.

This is only an accurate indicator of myocardial damage when it reaches its peak in 24 hours.

This is an accurate indicator of myocardial injury.

Answer and Explanation

The Correct Answer is D

A. This result indicates muscle injury but does not specify the source.

This statement is partly correct. An elevated troponin I level does indicate muscle injury, specifically damage to the heart muscle. However, troponin I is highly specific to cardiac muscle, so an elevated level would indeed specify the source as cardiac or myocardial injury.

B. Because the client has a history of unstable angina, this is a poor indicator of myocardial injury.

This statement is incorrect. A history of unstable angina does not diminish the significance of an elevated troponin I level. In fact, unstable angina is itself a serious condition that can lead to myocardial injury or heart attack, and an elevated troponin I level in this context indicates ongoing or recent myocardial damage.

C. This is only an accurate indicator of myocardial damage when it reaches its peak in 24 hours.

This statement is not entirely accurate. While it is true that troponin I levels may continue to rise and peak within 12-24 hours after the onset of myocardial injury, an elevated troponin I level at any point is still a significant indicator of myocardial damage. It's essential to recognize elevated troponin I levels promptly to initiate appropriate interventions and monitor the client's cardiac status closely.

D. This is an accurate indicator of myocardial injury.

This statement is correct. An elevated troponin I level is a highly sensitive and specific marker of myocardial injury. It indicates damage to the heart muscle, which can occur due to conditions like unstable angina, heart attack (myocardial infarction), myocarditis, or other cardiac issues. Therefore, recognizing an elevated troponin I level in a client with unstable angina is crucial for proper management and further evaluation.

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Correct Answer is ["A","C","E"]

Explanation

A. Anxiety:

Anxiety can lead to an increased heart rate due to the activation of the sympathetic nervous system. When a person is anxious, their body releases stress hormones like adrenaline, which can stimulate the heart to beat faster. This increased sympathetic activity can cause sinus tachycardia, where the heart rate is faster than normal.

B. Sleep:

While sleep can affect heart rate variability, causing fluctuations in heart rate during different stages of sleep, it typically does not cause a significant and sustained increase in heart rate like sinus tachycardia. Sleep is more likely to influence heart rate patterns rather than directly cause sinus tachycardia.

C. Fever:

Fever, especially in response to infection or inflammation, can lead to an elevated heart rate. The body's response to fever includes increased metabolic activity, which can raise the heart rate as part of the physiological stress response. Fever-induced sinus tachycardia is a common finding in individuals with infections.

D. Hyperglycemia:

While hyperglycemia (high blood sugar levels) can have cardiovascular effects over time, such as contributing to atherosclerosis and heart disease, it is not typically a direct cause of sinus tachycardia. Sinus tachycardia is more commonly associated with acute stressors like anxiety, fever, or hypovolemia (such as from blood loss).

E. Blood loss:

Significant blood loss, such as during surgery or due to trauma, can result in hypovolemia, where there is a decrease in blood volume circulating in the body. In response to hypovolemia, compensatory mechanisms kick in, including an increase in heart rate (sinus tachycardia), to maintain blood pressure and perfusion to vital organs.

Correct Answer is ["1712.32"]

Explanation

To calculate the client's total intake for the 8-hour shift, we need to convert all the volumes to milliliters (mL) and then add them together. Here are the given volumes and their conversions:

1,000 mL 0.9% sodium chloride IV (no conversion needed)

One 6-oz cup of coffee:

6 oz * 29.5735 (conversion factor for oz to mL) = approximately 177.44 mL

6 oz of water:

6 oz * 29.5735 = approximately 177.44 mL

One 180-mL bowl of soup (no conversion needed)

3 oz of flavored gelatin:

3 oz * 29.5735 = approximately 88.72 mL

3 oz of ice cream:

3 oz * 29.5735 = approximately 88.72 mL

Now, let's add up all the volumes:

1,000 mL (IV fluid) + 177.44 mL (coffee) + 177.44 mL (water) + 180 mL (soup) + 88.72 mL (gelatin) + 88.72 mL (ice cream) = 1,712.32 mL

Therefore, the nurse should document the client's total intake for the shift as approximately 1,712.32 mL.

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The nurse is caring for a client admitted with unstable angina. The laboratory result for the initial troponin I is elevated in this client. The nurse should recognize what implication of this assessment finding?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse receives a client from the post-anesthesia unit with a new onset of sinus tachycardia and a heart rate of 118 beats per minute. To which reasons does the nurse relate the increased heart rate? (Select All that Apply.)

Correct Answer is ["A","C","E"]

Explanation

Correct Answer is ["1712.32"]

Explanation

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