What is electrical activity of the heart is called an?

The electrical activity of the heart is called an electrocardiogram (ECG or EKG). This activity is generated by the heart's conduction system, which includes structures like the sinoatrial node, atrioventricular node, and the bundle of His. An ECG records the electrical impulses that trigger heartbeats, reflecting the heart's rhythm and overall health. It is a critical tool for diagnosing various cardiac conditions.