1. There is an energy selection switch on the instrument, and the doctor selects the appropriate discharge energy according to the patient's weight. Generally, the energy used for internal defibrillation cannot be greater than 50 J, and the external defibrillation is between 200 and 300J, with a maximum of 400J.

2. Display the patient's heart rhythm and ECG waveform. A defibrillator with a diagnostic function can automatically alarm for abnormal heart rhythms such as tachycardia, bradycardia, and cardiac arrest, and automatically record a few seconds of abnormal ECG waveform.
3.Synchronize the defibrillation pulse with the QRS complex in the ECG waveform, and the discharge pulse can only appear when the R wave appears. Generally applicable to the treatment of ventricular or supraventricular tachycardia, atrial flutter, atrial fibrillation, etc.

1. Automatic external defibrillator
Automatic external defibrillator (AED) is a portable medical device that is used as a "life-saving tool" for early defibrillation during out of hospital cardiac arrest (OHCA) to improve the survival rate of OHCA

2. Implantable cardioverter defibrillator
Implantable cardioverter defibrillator (ICD) can timely identify and effectively stop the occurrence of malignant arrhythmia, reduce the incidence of SCD, its efficacy is significantly better than simple anti-arrhythmic drug therapy, has now become a clinical prevention of malignant rhythm An important means of abnormality.

Cardiac defibrillator, also known as electrocardiograph, is mainly composed of defibrillation charge/discharge circuit, ECG signal amplification/display circuit, control circuit, electrocardiogram recorder, power supply, and defibrillation electrode board. It is widely used in clinical practice at present One of the rescue equipment. It uses pulsed current to act on the heart, implement electric shock treatment, eliminate arrhythmia, and restore the heart to sinus rhythm. It has the advantages of high efficacy, fast action, easy operation, and safety compared with drugs.