Final answer:
An electrocardiogram (ECG) is used to analyze the electrical activity of the heart during exercise for the diagnosis of heart-related conditions and irregular heart function.
Step-by-step explanation:
An electrocardiogram (ECG) is a recording of the electrical activity of the heart. Analysis of an ECG during exercise is often used in the diagnosis of heart-related conditions and irregular heart function. It can help in detecting abnormalities such as enlarged atria or ventricles, myocardial infarction (MI), and insufficient oxygen delivery to the heart muscle. However, it has limitations and further testing may be required to evaluate the effectiveness of pumping and to reveal other potential issues.