Key result
Lattice-tip RF ablation triggers a steam pop within 4 seconds, suggesting nonuniform catheter-tissue contact.
Case Report (n=1)
This case highlights the limitations of temperature monitoring and the importance of spatial catheter orientation during lattice-tip ablation to prevent steam pops.
Alerts to temperature monitoring limits with lattice-tip catheters; leaves open prospective validation of sensor reliability.
We report a case of steam pop occurring during lattice‐tip radiofrequency ablation. An 82‐year‐old woman underwent cavotricuspid isthmus ablation using a 9‐mm lattice‐tip catheter. Intracardiac echocardiography (ICE), electroanatomical mapping, and radiofrequency parameters were recorded simultaneously on a single system, allowing precise temporal correlation. A steam pop occurred at 4 s with a sudden microbubble shower on ICE at 65°C. The highest temperature was detected at the proximal thermocouple, suggesting nonuniform catheter–tissue contact. This case highlights limitations of temperature monitoring and the importance of spatial catheter orientation during lattice‐tip ablation.
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Matsunaga-Lee et al. (2026) conducted a case report in Cavotricuspid isthmus ablation (n=1). Lattice-tip radiofrequency ablation was evaluated on Steam pop occurrence. Lattice-tip radiofrequency ablation resulted in a steam pop at 4 seconds with a sudden microbubble shower on ICE at 65°C, suggesting nonuniform catheter-tissue contact.
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