What is a key advantage of cryoablation near the AV node?

• A. Cryomapping allows reversible test lesions before permanent cryo lesion
• B. It heats tissue faster than RF
• C. It produces more steam pops
• D. It cannot be used near AV node

Answer: (A)

Preserving AV nodal conduction while treating nearby tissue is the key idea. Cryoablation offers a reversible test phase called cryomapping, which cools the tissue enough to temporarily block it without creating a permanent lesion. This lets you see whether the target area can be ablated safely without causing AV block. If the monitoring during mapping looks favorable, you proceed to a permanent cryo lesion; if conduction worsens, you can stop and the tissue recovers as it thaws, avoiding lasting damage. This safety net is the main advantage of using cryo near the AV node.

The other statements don’t fit: heating tissue rapidly is not a feature of cryo (it relies on cooling), steam pops are more associated with rapid heating and aren’t an advantage of cryo, and cryo can indeed be used near the AV node, so the notion that it cannot is incorrect.