Lattice-tip vs. standard irrigated focal-tip catheter for radiofrequency ablation of the cavotricuspid isthmus - the LINEAR randomized trial

doi:10.1093/europace/euag046

Arrhythmias & electrophysiologyRandomised controlled trial

Lattice-tip vs. standard irrigated focal-tip catheter for radiofrequency ablation of the cavotricuspid isthmus - the LINEAR randomized trial

EuropacePublished 14 Apr 2026

Randomised controlled trial
multicentre
two centres

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Authors' conclusion

The lattice tip catheter resulted in higher acute procedural success for radiofrequency CTI ablation compared to the standard irrigated focal-tip catheter.

Study context

Population: Patients undergoing radiofrequency cavotricuspid isthmus (CTI) ablation
Participants: 102 patients

Comparison: Lattice-tip vs Standard
Primary endpoint: Achievement and persistence of bidirectional CTI block, confirmed by high-density electroanatomical mapping and adenosine testing
Follow-up: After a 60-minute waiting period

Primary result

As reported in the abstract

Lattice-tip94.1%

Standard68.6%

P = 0.002

Secondary outcomes

First-pass block

P = 0.001

Lattice-tip90.2%

Standard60.8%

Ablation time for CTI block

P < 0.001

Lattice-tip41.3 ± 12.1 s

Standard245.3 ± 91.3 s

Outcome	Lattice-tip	Standard	P value
Number of lesions	8.3 ± 2.4	13.4 ± 4.5	P < 0.001

Safety

Procedural complications

No procedural complications documented

Original publication

Lattice-tip vs. standard irrigated focal-tip catheter for radiofrequency ablation of the cavotricuspid isthmus - the LINEAR randomized trial. Europace. Published 14 April 2026. doi:10.1093/europace/euag046

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Summarised from the published abstract; every number is checked against it