By monitoring the electrical activity produced by the heart’s contractions, an ECG can identify cardiac issues. People who may be at risk for heart disease due to a family history of the condition, smoking, being overweight, having diabetes, having high blood pressure, or having high cholesterol are advised to get an ECG. For patients experiencing symptoms like chest discomfort, dyspnoea, lightheadedness, fainting, or rapid or irregular heartbeats, a physician could also suggest an ECG. The ECG is a non-invasive, safe exam.