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最近利用射频电流消蚀房室副束治疗室上性心动过速。房室副束电生理标测后,将7Fr导管插入和房室副束邻近的同侧心腔,进行消蚀。然后沿着房室瓣环,向激动最早的点发放射频电流(放电)。对于左边房室副束导管通常逆行横过主动脉进入左室,在二尖瓣前叶的后下方。对于右边房室副束,导管顺行进入右房或右室。 多谱勒超声心动观察射频消蚀前、后1周的变化。根据下列标准给瓣膜反流分级。(1)轻度:彩色多谱勒超声检查,反流幅度小,并证实心腔大小正常。(2)中度:易查出,有大幅度的喷射,伴有心腔扩大,(3)重度:易查出,大幅度喷射,心腔明显扩大。
Recently the use of RF current ablation atrioventricular bundle therapy for supraventricular tachycardia. Atrioventricular deputy beam after electrophysiological mapping, the 7Fr catheter and atrioventricular bundle adjacent ipsilateral ventricular cavity, for erosion. Then along the atrioventricular valve ring, to the earliest point of the RF current distribution (discharge). Auxiliary bundle ducts on the left atrioventricular usually go retrograde across the aorta into the left ventricle, posteriorly below the anterior mitral valve. For the right atrioventricular bundle, the catheter goes straight into the right atrium or right ventricle. Doppler echocardiography before and after RF ablation 1 week change. Valvular regurgitation was graded according to the following criteria. (1) Mild: color Doppler ultrasound examination, reflux rate is small, and confirmed normal heart chamber size. (2) moderate: easy to detect, there is a substantial jet, accompanied by expansion of the heart chamber, (3) severe: easy to detect, a substantial jet, the heart chamber was significantly expanded.