what are the expected changes on an ecg for a patient with hypokalemia

ATI RN

ATI Capstone Adult Medical Surgical Assessment 2

1. What are the expected changes on an ECG for a patient with hypokalemia?

A. Flattened T waves
B. Prominent U waves
C. ST elevation
D. Wide QRS complexes

Correct answer: A

Rationale: Flattened T waves are an early sign of hypokalemia on an ECG. Hypokalemia primarily manifests as flattened T waves on an ECG. While prominent U waves can be seen in hypokalemia, they are not as specific as flattened T waves. ST elevation is more commonly associated with conditions like myocardial infarction rather than hypokalemia. Wide QRS complexes are typically not a feature of hypokalemia on an ECG.

2. What is the first action a healthcare provider should take for a patient with possible acute coronary syndrome?

A. Administer sublingual nitroglycerin
B. Get IV access
C. Auscultate heart sounds
D. Obtain cardiac enzymes

Correct answer: A

Rationale: Administering sublingual nitroglycerin is the initial priority action for a patient with possible acute coronary syndrome. Nitroglycerin helps dilate blood vessels, reduce chest pain, and improve blood flow to the heart muscle. This helps in relieving symptoms and preventing further damage to the heart. Establishing IV access, auscultating heart sounds, and obtaining cardiac enzymes are important steps in the assessment and management of acute coronary syndrome but are not the first actions to be taken. IV access may be needed for administering medications or fluids, auscultating heart sounds helps in assessing the heart's function, and obtaining cardiac enzymes aids in diagnosing a heart attack.

3. What is an escharotomy and why is it performed?

A. A surgical incision made to improve circulation in burn injuries
B. A procedure to remove dead tissue from a wound
C. A procedure to remove excess fluid from the lungs
D. A procedure to relieve pain from burns

Correct answer: A

Rationale: An escharotomy is a surgical procedure involving an incision through the eschar (dead tissue) to relieve pressure in burn injuries. It is performed to improve circulation to the affected area, prevent further damage, and restore blood flow. Choice B is incorrect because an escharotomy is not primarily focused on removing dead tissue but rather on relieving pressure. Choice C is incorrect as it describes a procedure related to pulmonary issues, not burn injuries. Choice D is incorrect because while pain relief may be a result of an escharotomy, it is not the primary purpose of the procedure.

4. What is the priority action if a patient experiences abdominal cramping during enema administration?

A. Lower the height of the solution container
B. Increase the flow of the enema solution
C. Stop the procedure and remove the tubing
D. Continue the enema at a slower rate

Correct answer: A

Rationale: During enema administration, if a patient experiences abdominal cramping, the priority action is to lower the height of the solution container. This adjustment can help relieve abdominal cramping by reducing the flow rate of the enema, making it more comfortable for the patient. Increasing the flow of the enema solution (Choice B) can exacerbate the cramping. Stopping the procedure and removing the tubing (Choice C) may be necessary in some cases of severe discomfort or complications, but adjusting the height of the solution container should be the initial response. Continuing the enema at a slower rate (Choice D) may not address the immediate need to alleviate the cramping.

5. What ECG changes are seen in hypokalemia?

A. Flattened T waves on the ECG
B. Elevated ST segments on the ECG
C. Widened QRS complex
D. Prominent U waves on the ECG

Correct answer: A

Rationale: The correct answer is A: Flattened T waves on the ECG. Flattened T waves are an early indicator of hypokalemia on an ECG. Choice B, Elevated ST segments, is not typically seen in hypokalemia but can be a sign of myocardial infarction. Choice C, Widened QRS complex, is more commonly associated with hyperkalemia. Choice D, Prominent U waves, is typically associated with hypokalemia, but flattened T waves are considered a more specific and early sign.