What is the correct instruction for a patient undergoing a stress test regarding clothing?

The best instruction for a patient undergoing a stress test is to wear loose and comfortable clothing. This recommendation is based on the need for the patient to move freely during the test. Stress tests often involve physical activity that can elevate the heart rate, and wearing tight clothing can restrict movement and potentially interfere with the test's accuracy or cause discomfort.

Comfortable clothing allows for a full range of motion, which is essential for an effective evaluation of the heart's response to exercise. Additionally, suitable attire keeps the patient at ease during the test, allowing healthcare professionals to accurately monitor cardiovascular performance.

Other choices, such as wearing tight-fitting clothing, high heels, or a heavy jacket, would not facilitate optimal performance during the stress test and can create discomfort, restrict movement or increase body temperature, potentially skewing the results. Thus, the instruction for loose and comfortable clothing is aligned with ensuring the patient can participate in the stress test safely and effectively.