elektrokardiogramu

Elektrokardiogramu, commonly abbreviated as ECG or EKG, is a non-invasive diagnostic test that records the electrical activity of the heart. This activity is generated by the depolarization and repolarization of cardiac muscle cells, which cause electrical impulses that spread throughout the heart. The ECG machine detects these electrical signals through electrodes placed on the skin of the chest, arms, and legs.

The recording produced by an ECG is a graphical representation of the heart's electrical events over time. It displays a series of waves, segments, and intervals, each corresponding to specific electrical processes within the heart. For example, the P wave represents atrial depolarization, the QRS complex represents ventricular depolarization, and the T wave represents ventricular repolarization.

Healthcare professionals use ECGs to diagnose a wide range of cardiac conditions. These include arrhythmias (irregular heartbeats), myocardial infarction (heart attack), ischemia (reduced blood flow to the heart muscle), and electrolyte imbalances. It can also be used to monitor the effectiveness of cardiac treatments and to screen for heart disease in individuals with risk factors. The procedure is quick, painless, and provides valuable information about the heart's function.