A nurse is reviewing the lab results and electrocardiogram (ECG) of a patient with End Stage Renal Disease (ESRD). The nurse correlates which ECG finding to a potassium level of 6.8?

Prolonged PR interval

Presence of a U wave

Peaked T waves

Elevated ST segment

Answer and Explanation

The Correct Answer is C

A. A prolonged PR interval can be seen in hyperkalemia but is not as characteristic as peaked T waves.
B. A U wave is typically seen in hypokalemia, not hyperkalemia.
C. Peaked T waves are a hallmark ECG finding in hyperkalemia and occur due to increased repolarization speed.
D. ST segment elevation is more commonly associated with myocardial infarction rather than hyperkalemia.

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Correct Answer is A

Explanation

A. Elevated troponins are the most specific and sensitive markers for myocardial injury. Troponin I and Troponin T levels rise within a few hours of an AMI and remain elevated for days, confirming cardiac damage.
B. Elevated hemoglobin is not an indicator of cardiac injury. Hemoglobin levels are used to assess oxygen-carrying capacity and anemia.
C. Elevated B-type natriuretic peptide (BNP) is a marker for heart failure, not acute myocardial infarction.
D. Elevated creatine kinase (CK), particularly CK-MB, can indicate muscle injury, including cardiac injury, but it is less specific than troponins for diagnosing AMI.

A. "The test is used to identify the extent of blockages in the arteries in the heart." B. "You will not be permitted to eat or drink after midnight." C. "The test is used to assess the structures and function of the valves and heart muscle." D. "During the test, there will be slight discomfort in the chest area."

Correct Answer is C

Explanation

A. An echocardiogram does not assess coronary artery blockages; a coronary angiogram or cardiac catheterization is used for that.
B. Fasting is not required for a standard transthoracic echocardiogram. However, fasting may be needed for a transesophageal echocardiogram (TEE).
C. An echocardiogram is a non-invasive ultrasound test that evaluates heart structure, valve function, and cardiac muscle performance.
D. There is no discomfort during a transthoracic echocardiogram, as it is performed externally using a probe on the chest.

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A nurse is reviewing the lab results and electrocardiogram (ECG) of a patient with End Stage Renal Disease (ESRD). The nurse correlates which ECG finding to a potassium level of 6.8?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is caring for a client with a possible acute myocardial infarction (AMI). The electrocardiogram (ECG) shows no ST segment elevations or depression. The nurse is aware that an elevation of which lab result will determine if there has been cardiac injury?

Correct Answer is A

Explanation

A nurse is caring for a client who is scheduled for an echocardiogram the following day. Which of the following information should the nurse include about the test?

Correct Answer is C

Explanation

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