what are the expected ecg findings in hypokalemia

ATI RN

ATI Capstone Medical Surgical Assessment 2 Quizlet

1. What are the expected ECG findings in hypokalemia?

A. Flattened T waves
B. Prominent U waves
C. Elevated ST segments
D. Wide QRS complex

Correct answer: A

Rationale: Flattened T waves are the classic ECG finding in hypokalemia. Hypokalemia primarily affects the repolarization phase of the cardiac action potential, leading to T wave abnormalities. While prominent U waves are typically associated with hypokalemia as well, flattened T waves are the most specific and sensitive ECG abnormality seen in hypokalemia. Elevated ST segments and wide QRS complexes are not typically seen in hypokalemia and are more indicative of other electrolyte imbalances or cardiac conditions.

2. What is the priority dietary modification for a patient with pre-dialysis end-stage kidney disease?

A. Limit phosphorus intake to 700 mg/day
B. Increase potassium intake to 3 g/day
C. Eat three large meals per day
D. Restrict protein intake to 1 g/kg/day

Correct answer: A

Rationale: The correct answer is A: Limit phosphorus intake to 700 mg/day. In patients with pre-dialysis end-stage kidney disease, restricting phosphorus intake is crucial to manage their condition. Excessive phosphorus can lead to mineral and bone disorders, which are common in kidney disease. Choice B, increasing potassium intake, is not the priority and can be harmful as kidney disease often leads to hyperkalemia. Choice C, eating three large meals per day, is not recommended as smaller, frequent meals are usually better tolerated. Choice D, restricting protein intake to 1 g/kg/day, is important in later stages of kidney disease but is not the priority at the pre-dialysis stage.

3. A nurse is planning care for a group of postoperative clients. Which of the following interventions should the nurse identify as the priority?

A. Administer IV pain medication to a client who reports pain as a 6 on a scale of 0 to 10
B. Administer oxygen to a client who has an oxygen saturation of 91%
C. Instruct a client who is 1 hr postoperative about coughing and deep breathing exercises
D. Initiate an infusion of 0.9% sodium chloride for a client who has just had abdominal surgery

Correct answer: B

Rationale: The priority intervention is administering oxygen. Postoperatively, the client's oxygen saturation should be at or above 95%. Oxygen is essential for tissue perfusion and cellular oxygenation. While managing pain is important, oxygenation takes precedence. Instructing a client about coughing and deep breathing exercises is important for preventing respiratory complications but is not as urgent as addressing low oxygen saturation. Initiating an infusion of 0.9% sodium chloride is a routine postoperative intervention for fluid balance but is not the priority when oxygen saturation is low.

4. What is a characteristic sign of hypokalemia on an ECG?

A. Flattened T waves
B. ST elevation
C. Prominent U waves
D. Widened QRS complex

Correct answer: A

Rationale: Flattened T waves are a characteristic sign of hypokalemia on an ECG. When potassium levels are low, it can lead to changes in the ECG, such as T wave flattening. This alteration is important to recognize as it indicates potential electrolyte imbalances. ST elevation (Choice B) is not typically associated with hypokalemia but can be seen in conditions like myocardial infarction. Prominent U waves (Choice C) are associated with hypokalemia, but flattened T waves are more specific. Widened QRS complex (Choice D) is not a typical ECG finding in hypokalemia but can be seen in conditions like hyperkalemia.

5. A client who has burn injuries covering their upper body is concerned about their altered appearance. Which of the following statements should the nurse make?

A. It is okay to not want to touch the burned areas of your body.
B. Cosmetic surgery should be performed within the next year to be effective.
C. Reconstructive surgery can completely restore your previous appearance.
D. It could be helpful for you to attend a support group for people who have burn injuries.

Correct answer: D

Rationale: The nurse should encourage the client to attend a support group for individuals who have burn injuries. Support groups can provide emotional support, shared experiences, and coping strategies for accepting their altered appearance. Choice A is not the best response as it does not offer proactive support. Choice B is not appropriate as the timing of cosmetic surgery should be determined by healthcare providers, not immediate. Choice C is misleading as reconstructive surgery may improve appearance but may not completely restore the previous look.