Final answer:
A healthcare provider can use chemicals to cause the subject's heart to respond as if exercising in a pharmacological stress test.
Step-by-step explanation:
If a person is unable to perform an exercise stress test on a treadmill or bicycle ergometer, the healthcare provider can use chemicals to cause the subject's heart to respond as if exercising. This is known as a pharmacological stress test. The person is given medication (such as adenosine or dobutamine) that mimics the effects of physical exercise on the heart. The heart rate and blood pressure are monitored to assess the heart's response.
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