Name two energy modalities used for EP ablation and a key advantage of each.

• A. Cryoablation: reversible cooling and safety mapping (cryo-mapping); RF ablation: durable tissue heating and lesion formation
• B. RF ablation: safety mapping through temperature markers only
• C. Cryoablation: always achieves deeper lesions than RF
• D. RF ablation: no tissue heating

Answer: (A)

In EP ablation, two common energy modalities are used: cryoablation and radiofrequency (RF) ablation. Cryoablation freezes tissue, and its main advantage is cryomapping—the ability to temporarily cool and reversibly suppress conduction to test the effect before making a permanent lesion. This safety-focused testing is especially valuable near critical structures, and the tissue tends to adhere to the catheter during freezing, which can improve stability during the procedure. RF ablation heats tissue with high-frequency energy, producing durable, transmural lesions that reliably interrupt abnormal conduction pathways. This makes RF particularly effective for creating lasting blocks and rapid, extensive lesion formation. The other choices either misstate how RF safety is assessed, claim cryo produces deeper lesions than RF, or claim RF involves no tissue heating, which are not accurate.