With the development of minimally invasive technology, the scope of medical technology continues to expand, providing a new way for doctors to diagnose and treat patients. These advances enable minimally invasive techniques to be used in more complicated operations that were previously considered unsuitable for minimally invasive surgery. With the further development of these medical innovations, the medical field using minimally invasive technology is also growing. The benefits of minimally invasive technology include more accurate incision, smaller wound, less blood loss, fewer complications, lighter pain, faster recovery of patients and shorter hospital stay. To ensure the success of these minimally invasive techniques and realize the above benefits, it is necessary to make accurate and reliable measurements with the help of force, pressure, temperature and other sensors, so that the equipment can play its due role. In addition, these sensor devices are constantly improving, becoming more and more ingenious, and accommodating more intelligent technologies to adapt to and support these minimally invasive medical devices. So, now let's learn about the cardiac ablation surgery and cardiac ablation catheter.

Here is the content:

l Introduction of arrhythmia

l Classification of cardiac ablation surgery

Introduction of arrhythmia

Arrhythmia refers to any change in the unusualheart rate or rhythm of the heart, which occurs in the generation or conduction of electrical activity in the myocardium. In a healthy heart, the sinoatrial node acts as a pacemaker, producing electrical impulses, which are then transmitted to the ventricle through the atrium, so it is called "sinus rhythm". Sinus node, atrioventricular node, atrioventricular bundle and Purkinje fiber act as the network of cardiac current conduction, stimulating the beating of the heart and maintaining the normal operation of the human blood system.

Arrhythmia develops through one of the following two mechanisms:

(1) Variable pulse generation, for example, the change of automaticity (the ability to spontaneously generate electric pulses that lead to depolarization) of pacemaker cells in the sinoatrial node;

(2) Or pulse conduction through the change of action potential from outside the sinus node, for example, complete or partial block of conduction pathway in myocardium. The impact of these changes depends on their hemodynamic consequences and the associated risk of degeneration into potentially life-threatening arrhythmia.

Classification of cardiac ablation surgery

Cardiac ablation requires the catheter to be inserted through the groin or neck area. The electrode at the tip of the catheter can help doctors detect electrophysiological characteristics and determine the position of abnormal electrical signals. Once the exact position is determined, the doctor can deliver energy through the catheter to ablate the local area. Now commonly used ablation techniques can be divided into traditional radiofrequency ablation and cryoablation. The recent emerging ablation technologies include pulsed electric field ablation and radiofrequency ablation, and the basic principle of which is hyperthermia.

Radiofrequency ablation has the advantages of simple operation, less trauma, short operation time, less chance of infection and quick wound healing. Its main approaches are percutaneous puncture, laparoscopy and open radiofrequency ablation under the guidance of relevant imaging techniques. At present, the most commonly used imaging guidance methods are B-ultrasound and CT in turn. The damage range of RF current introduced into cardiac cavity through catheter is 1-3mm, which will not cause harm to the body. Radiofrequency ablation Percutaneous radiofrequency ablation has the advantages of small trauma, short operation time, quick recovery, simple operation and repeated application.

Cryotherapy is a new technology for catheter ablation of atrial fibrillation. Its principle is to take away the heat of tissue through the heat absorption and evaporation of liquid refrigerant, so as to lower the temperature of the target ablation site and destroy the abnormal electrophysiological cell tissue, thus treating arrhythmia. The emergence of cryoablation technology has changed the situation of traditional catheter radiofrequency ablation, such as complicated operation, long time consuming and high risk. Patients are painless, well tolerated, with a low recurrence rate. Doctors' operation is safer, simpler and more effective.

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