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Radiofrequency ablation
Release time:
2022-01-10
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The third chapter: radiofrequency ablation radiofrequency ablation function indications: bypass, double path caused by tachycardia can also treat ventricular tachycardia, atrial tachycardia, atrial flutter, atrial fibrillation, frequent premature beats, etc. The mechanism of radiofrequency ablation surgery: high-frequency radiofrequency current (sinusoidal alternating current with a frequency of 100KHZ-1.5MKHZ) is used to generate electromagnetic heat when passing through myocardial tissue, resulting in increased tissue temperature, dehydration, and myocardial coagulation necrosis to destroy abnormal conduction paths or ectopic excitations to achieve the purpose of treating tachycardia. Puncture and intubation technique (taking femoral vein as an example): Generally, the right femoral vein is selected. Disinfect the groin regular and touch the femoral vein with the middle, food and ring fingers of the left hand. With the femoral vein as the mark, local anesthesia is performed with 1%-2% lidocaine at a position not 2CM below the groin and 1CM inside the femoral vein, and the needle is inserted at an angle of 30-45 with the skin until the entire puncture needle enters the skin or the needle touches the bone and cannot continue to enter (the needle penetrates the femoral vein). Carefully slowly back the puncture needle, once into the femoral vein, visible dark red venous blood slowly flow out, through the needle hole into the guide wire. Withdraw the puncture needle, retain the guidewire, gently cut the skin with a scalpel at the place where the guidewire enters the skin, insert the guidewire into the vein sheath, withdraw the guidewire and the inner sheath, and put the electrode catheter into the lumen of the outer sheath. The catheter position can be determined by reference to the position of the catheter under fluoroscopy and the intracardiac electrocardiogram of the recorder. Common puncture sites are: puncture the right femoral vein, through the inferior vena cava, used to put HRA, HBE, RV and other catheters. Puncture the left subclavian vein, through the superior vena cava, for placement of the CS catheter; puncture the right femoral artery, retrograde through the aorta, right ventricle-for enlargement of the head catheter to the left ventricle (ablation of the left side).
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