Clinically, it should be called cardiac defibrillator, which is a medical electronic device that uses electric shock to rescue and treat arrhythmia. Only when all the muscle fibers of the heart contract accurately and synchronously can the heart produce effective pulsation. When patients have severe tachyarrhythmia, such as atrial flutter, atrial fibrillation, supraventricular or ventricular tachycardia, it often causes hemodynamic disorders to varying degrees. Especially when patients have ventricular fibrillation, normal and regular ventricular contraction is replaced by rapid and irregular fibrillation, which leads to a serious decrease in blood stroke. If the normal heart rhythm cannot be restored quickly, the patient will die soon. Defibrillator is to apply instantaneous high-energy electric shock to the heart to depolarize myocardial cells and stop uncoordinated contraction, and then sinus node can restore normal sinus rhythm.
There is also a defibrillator monitor, which is a combination of a cardiac defibrillator and an ECG monitor. In addition to the function of defibrillator, it can also obtain ECG signals through defibrillation electrodes or independent ECG monitoring electrodes and display them on the monitoring screen. Usually, it is only used as an ECG monitor to give an alarm when ventricular fibrillation occurs. The operator uses a defibrillator to perform defibrillation, and can observe the defibrillation waveform and the ECG recovery waveform after defibrillation through the monitor. Some defibrillation monitors have not only oscilloscope display, but also recorder, which can automatically record when the heart rhythm is abnormal or after defibrillation, and automatically record the output waveform and abnormal electrocardiogram of the defibrillator on the recording paper.
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