Physical Therapy Assistant Practice Exam

What is a common symptom of hypokalemia that could impact a patient's rehabilitation?

1. Increased energy levels

2. Muscle weakness

3. Improved coordination

4. Decreased resting heart rate

The correct answer is: Muscle weakness

Muscle weakness is indeed a common symptom of hypokalemia, which is characterized by low levels of potassium in the blood. Potassium is essential for normal muscle function, as it helps facilitate the transmission of electrical signals in muscle fibers. When potassium levels are inadequate, muscle cells may not function optimally, leading to weakness, fatigue, and even muscle cramping. This muscle weakness can significantly impact a patient's rehabilitation, as it may reduce their ability to perform exercises, participate in physical therapy sessions, or even carry out daily activities. In contrast, symptoms such as increased energy levels or improved coordination do not typically relate to hypokalemia. In fact, patients experiencing hypokalemia may feel lethargic rather than energized. Similarly, a decreased resting heart rate is not characteristic of hypokalemia; rather, patients may experience irregularities in heart rhythm as a consequence of low potassium levels. Therefore, identifying muscle weakness as a symptom of hypokalemia is crucial, as it directly affects the patient’s capacity to engage in and benefit from rehabilitation efforts.