Understanding The Role And Principle Of ECG Lead Wires: The Key To ECG Testing

Electrocardiography (ECG or EKG) is a diagnostic and therapeutic technology that records the electrophysiological activity of the heart in time units through the body wall and captures and records it through electrodes in contact with the skin. ECG leads are a key component in ECG testing, and their role and principle directly affect the accuracy and reliability of ECG testing. In this article, we will explore the role and principle of ECG leads in depth to have a more comprehensive understanding of the key to ECG testing.

ECG leads are used in conjunction with monitors, ECG machines, etc., connected between the instrument and the electrode, and used to transmit electrophysiological signals collected from the human body surface. When the myocardial cells depolarize each heartbeat, a small electrical change will be caused on the surface of the skin. This small change is captured and amplified by the ECG recording device to depict the ECG. By observing the ECG, doctors can evaluate the functional state of the heart, detect arrhythmias, insufficient coronary blood flow, and determine whether the heart muscle is damaged.

ECG leads are usually composed of conductive cables and electrodes. The conductive cable is the part that connects the ECG monitor or ECG machine with the electrode, which can transmit the ECG signal to the device for analysis and display. The electrode is the part attached to the patient, usually with multiple electrodes, attached to the chest and limbs, to obtain different ECG signals.

The characteristics of the ECG lead wire mainly include the following aspects. First, it has good conductivity and can accurately transmit ECG signals to ensure the accuracy of the ECG. Secondly, the ECG lead wire is made of soft material, which makes the patient feel comfortable when wearing it and will not cause irritation or discomfort to the patient's skin. In addition, the ECG lead wire also has a protective function, which can effectively prevent interference from interfering signals and improve the quality of the ECG.

ECG detection usually adopts a multi-lead method to record the potential difference of the heart's electrical activity at different lead positions. The arrangement and connection method of the ECG lead wire enables different leads to obtain different angles and information, so as to fully understand the electrical activity state of the heart.

In short, ECG lead wire is an important device in medical diagnosis and monitoring equipment. It can accurately transmit ECG signals and help doctors monitor and diagnose the heart. It has good conductivity, comfortable wearing and protective functions. According to different application requirements, ECG lead wires can be divided into three-lead, five-lead and twelve-lead types.