Disturbances of the conduction system affect the rate,rhythm,and effectiveness of the contracting heart.Surgical techniques have been developed to treat a variety of supraventricular dysrhythmias and both ischemic and nonischemic ventricular tachydysrhythmias.Preprocedural electrophysiologic mapping of the patient's conduction pathways identifies and locates aberrant pathways,or ectopic foci.A catheter is inserted percutaneously into the femoral vein or artery and threaded retrograde to the right or left atrium and ventricle.Various areas of the heart are tested in an attempt to reproduce the dysrhythmia;then the area of the heart where the rhythm disturbance originates is ablated.What directed energy source is employed to produce this selective ablation effect?

Question

Quizplus · Accepted Answer

Currently,the focus is on the selective ablation (with cryotherapy,ultrasonic energy,or radiofrequency [RF] energy sources)of tissues surrounding,for example,the pulmonary veins to reestablish normal conduction pathways.

Disturbances of the Conduction System Affect the Rate,rhythm,and Effectiveness of the Contracting