Catheter ablation is a medical procedure used to treat certain heart rhythm disorders, known as arrhythmias. During the procedure, a thin, flexible tube called a catheter is inserted into a blood vessel and guided to the heart. The catheter delivers energy, such as radiofrequency or cryotherapy, to destroy small areas of heart tissue that are causing abnormal electrical signals. This treatment aims to restore a normal heart rhythm and can help reduce symptoms like palpitations or shortness of breath. Catheter ablation is often considered when medications are ineffective or cause unwanted side effects.