ECG Machine – Single Channel NSL iE101 Biocare (China)

ECG Machine is used for recording the electrical activity of theheartover a period of time usingelectrodesplaced on the skin. These electrodes detect the tiny electrical changes on the skin that arise from theheart muscle‘selectrophysiologicpattern ofdepolarizingandrepolarizingduring eachheartbeat. It is very commonly performed to detect any cardiac problems.

In a conventional 12-lead ECG, ten electrodes are placed on the patient’s limbs and on the surface of the chest. The overall magnitude of the heart’selectrical potentialis then measured from twelve different angles (“leads”) and is recorded over a period of time (usually ten seconds). In this way, the overall magnitude and direction of the heart’s electrical depolarization is captured at each moment throughout the cardiac cycle.^[4]The graph of voltage versus time produced by thisnoninvasivemedical procedure is anelectrocardiogram.

During each heartbeat, a healthy heart has an orderly progression of depolarization that starts withpacemaker cellsin thesinoatrial node, spreads out through theatrium, passes through theatrioventricular nodedown into thebundle of Hisand into thePurkinje fibers, spreading down and to the left throughout theventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing.

To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system.^[5]Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of theheart chambers, the presence of any damage to the heart’s muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted心脏起搏器.