What is the main function of an electrocardiogram (ECG) machine?

The main function of an electrocardiogram (ECG) machine is to record the electrical activity of the heart over time. This activity is crucial for diagnosing various cardiac conditions, as it provides important insights into how the heart is functioning. The ECG captures the electrical signals generated by the heart as it beats, displaying them as waveforms on a monitor or printed graph. These waveforms can reveal information about heart rate, rhythm, and the presence of any irregularities or abnormalities in the heart's electrical conduction system. This data is essential for healthcare professionals to assess heart health and guide treatment decisions.

Understanding this role of the ECG highlights its importance in cardiovascular diagnostics, differentiating it from other monitoring tools that assess functions such as blood pressure, oxygen saturation, or respiratory function.