what ecg changes should be monitored in a patient with hypokalemia

ATI RN

ATI Capstone Medical Surgical Assessment 2 Quizlet

1. What ECG changes should be monitored in a patient with hypokalemia?

A. Flattened T waves and prominent U waves
B. Elevated ST segments and wide QRS complexes
C. Tall T waves and flattened QRS complexes
D. Widened QRS complexes and decreased P wave amplitude

Correct answer: A

Rationale: The correct answer is A: Flattened T waves and prominent U waves. In hypokalemia, there is a decrease in potassium levels, which can lead to ECG changes such as flattened T waves and prominent U waves. These changes are classic findings associated with hypokalemia. Choices B (Elevated ST segments and wide QRS complexes), C (Tall T waves and flattened QRS complexes), and D (Widened QRS complexes and decreased P wave amplitude) are all incorrect. Elevated ST segments and wide QRS complexes are not typically seen in hypokalemia. Tall T waves and flattened QRS complexes, as well as widened QRS complexes and decreased P wave amplitude, do not represent the typical ECG changes seen in hypokalemia.

2. A client has a right-sided pneumothorax, and a chest tube is inserted. Which finding indicates that the chest drainage system is functioning correctly?

A. Gentle bubbling in the suction chamber
B. Crepitus around the insertion site
C. Constant bubbling in the water seal chamber
D. Absence of breath sounds on the right side

Correct answer: A

Rationale: In a chest drainage system, gentle bubbling in the suction chamber indicates proper functioning, showing that the system is connected and working effectively to remove air or fluid from the pleural space. Crepitus around the insertion site (Choice B) suggests subcutaneous emphysema, not chest tube functionality. Constant bubbling in the water seal chamber (Choice C) indicates an air leak. Absence of breath sounds on the right side (Choice D) is indicative of the pneumothorax, not the chest tube function.

3. Which ECG change is associated with hyperkalemia?

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

Correct answer: A

Rationale: Flattened T waves are a characteristic ECG change seen in hyperkalemia. Hyperkalemia affects the repolarization phase of the cardiac cycle, leading to T wave abnormalities. Prominent U waves are typically seen in hypokalemia. Elevated ST segments are more indicative of myocardial infarction or pericarditis. Widened QRS complexes are commonly associated with conditions like bundle branch blocks or certain toxicities.

4. A nurse is assessing a client who has a sodium level of 122 mEq/L. Which of the following findings should the nurse expect?

A. Decreased deep tendon reflexes
B. Positive Chvostek's sign
C. Hyperactive bowel sounds
D. Dry mucous membranes

Correct answer: A

Rationale: Corrected deep tendon reflexes occur with hyponatremia. Other manifestations of hyponatremia include headache, confusion, lethargy, fatigue, seizures, and muscle weakness. Positive Chvostek's sign is associated with hypocalcemia, hyperactive bowel sounds are not typically related to hyponatremia, and dry mucous membranes are more commonly seen with dehydration.

5. What are the characteristics of a thrombotic stroke?

A. Gradual onset over minutes to hours
B. Numbness on one side of the body
C. Associated with a loss of consciousness
D. Associated with seizures and convulsions

Correct answer: A

Rationale: The correct answer is A. Thrombotic strokes typically have a gradual onset over minutes to hours as they result from a clot obstructing blood flow. Choice B, numbness on one side of the body, is more commonly associated with an ischemic stroke rather than specifically a thrombotic stroke. Choice C, loss of consciousness, is not a defining characteristic of a thrombotic stroke. Choice D, seizures and convulsions, are more commonly seen in hemorrhagic strokes rather than thrombotic strokes.