Electrocardiogram (ECG) is a non-invasive adjunctive technique for the diagnosis of cardiac diseases in which lead wires are connected to the body and thus reflect the electrical activity of the heart through the various connections of the ECG machine.
The ECG is divided into limb leads and chest leads. To ensure that the ECG activity is well recorded, the electrode pads are moistened with water before the examination. The limb leads are divided into 4 colors: red, yellow, green, and black, and are located in the right and left upper limbs, and the left and right lower limbs, respectively, to ensure that the electrode pads should be on the inner side of the limbs. Chest leads are divided into 6 leads, corresponding to the 6 colors of red, yellow, green, brown, black and purple.
ECG can better reflect the electrical activity of the heart at that time, which is very important for the diagnosis of arrhythmia. ECG should be performed at the time of cardiac discomfort, and if the cardiac discomfort has been relieved on its own, it will be difficult to capture the image of arrhythmia, and it will be difficult to make a clear diagnosis.
Therefore, when heart discomfort occurs, an ECG should be performed as soon as possible, and a doctor should be consulted as soon as possible for systematic diagnosis and treatment.