What treatment for cardiac arrhythmias uses energy delivered by a thin intravascular tube?

The treatment for cardiac arrhythmias that uses energy delivered by a thin intravascular tube is called catheter ablation. During this procedure, a catheter is inserted into a blood vessel and guided to the heart, where it delivers energy—typically radiofrequency or cryoablation—to destroy the tissue responsible for the abnormal electrical signals. This helps restore a normal heart rhythm and can be effective for various types of arrhythmias.