What is the clinical evidence from this study?

Study design: Observational. Population: Patients undergoing first-time radiofrequency catheter ablation for new-onset paroxysmal atrial fibrillation (n=25). Intervention: Radiofrequency catheter ablation vs. NA (observational study). Primary outcome: Recurrence of atrial fibrillation after blanking period of 3 months up to 18 months post-ablation.

What question did this study set out to answer?

The study aims to assess how cardiac magnetic resonance imaging can identify lesions and guide re-ablation in patients with paroxysmal atrial fibrillation post-catheter ablation.

February 20, 2026The International Journal of Cardiovascular ImagingOpen Access

Cardiac magnetic resonance imaging for post-ablation lesion assessment and guiding re-ablation strategies in patients with paroxysmal atrial fibrillation

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Key result

Post-ablation CMR identifies complete PV lesions in 8% of patients and detects gaps for successful re-isolation.

n=25

Why the study?

Atrial fibrillation recurrence after catheter ablation, often due to incomplete lesions, remains a challenge, prompting evaluation of cardiac magnetic resonance to characterize lesion formation and guide re-ablation strategies.

Does cardiac magnetic resonance imaging post-ablation characterize lesion formation and guide re-ablation strategies in patients with paroxysmal atrial fibrillation?

Population

25 patients undergoing first-time RFCA for paroxysmal AF

Comparison

Pre-ablation vs 3 months post-ablation CMR assessment

Design

Prospective, single-center study

Follow-up

18 months

Authors

SRSophie RierUtrecht University TSTommaso SeminoCardiac Imaging GZGiulia De ZanCardiac Imaging

Discussion

Member takes

Implication

CMR may identify gaps amenable to re-isolation in recurrent AF; leaves open whether routine use improves outcomes.

Key Points

The study aims to assess how cardiac magnetic resonance imaging can identify lesions and guide re-ablation in patients with paroxysmal atrial fibrillation post-catheter ablation.
Enrolled patients undergoing first-time radiofrequency catheter ablation for paroxysmal AF.
Performed pre-ablation cardiac magnetic resonance for functional, anatomical, and fibrosis assessment.
Conducted repeat cardiac magnetic resonance 3 months post-ablation to quantify fibrosis and detect lesion gaps.
Monitored AF recurrence for 18 months.
32% of patients experienced AF recurrence after ablation.
Significant increase in atrial fibrosis noted post-ablation, with only 8% having complete circumferential pulmonary vein lesions.
Patients with detected lesion gaps were effectively treated with a single re-isolation procedure.
Others with extensive lesions required multiple repeat procedures.

Study Design

Type

Observational (n=25)

Multicenter

Structured PICO

Does cardiac magnetic resonance imaging post-ablation characterize lesion formation and guide re-ablation strategies in patients with paroxysmal atrial fibrillation?

Population

25 patients undergoing their first radiofrequency catheter ablation (RFCA) for new-onset paroxysmal atrial fibrillation, mean age 62.1, 20% female, based in the Netherlands. Exclusions: recent myocardial infarction, structural heart disease, prior cerebrovascular accident, severe renal impairment (eGFR ≤ 30 ml/min), and implantable devices.

Intervention

Cardiac magnetic resonance (CMR) imaging performed pre-ablation and 3 months post-ablation to assess functional, anatomical, and fibrosis parameters, including Image Intensity Ratio (IIR) and lesion gaps (≥ 3 mm discontinuities in late gadolinium enhancement).

Outcome

Assessment of pulmonary vein isolation lesions (fibrosis and gaps) using CMR 3 months post-ablation, and correlation with atrial fibrillation recurrence monitored over 18 months.surrogate

CMR imaging 3 months post-ablation can identify lesion gaps and help distinguish AF recurrence due to insufficient initial ablation from other triggers, potentially guiding tailored re-ablation strategies.

Limitations

Single-center study with small sample size (N=25) limiting statistical power and generalizability
Holter monitoring was discretionary potentially underdetecting asymptomatic AF episodes
CMR findings were not used to guide management, limiting causality conclusions
Study only included patients treated with radiofrequency ablation, results may not apply to other ablation modalities
Excluded LA strain assessment which could influence procedural success rates
Single center and relatively small cohort of 25 patients
Focus on new-onset paroxysmal AF restricts generalizability to more complex AF phenotypes
Holter monitoring performed at clinician's discretion, potentially underdetecting asymptomatic AF
Variations in 3D LGE sequence acquisition and timing
Exclusively utilized radiofrequency ablation, limiting applicability to other modalities
LA strain measurements were not included

Cite This Study

Rier et al. (2026) conducted an observational in Patients undergoing first-time radiofrequency catheter ablation for new-onset paroxysmal atrial fibrillation (n=25). Radiofrequency catheter ablation vs. NA (observational study) was evaluated on Recurrence of atrial fibrillation after blanking period of 3 months up to 18 months post-ablation. Cardiac magnetic resonance imaging identified that 8% of patients had complete circumferential pulmonary vein lesions post-RF ablation, with 32% experiencing atrial fibrillation recurrence; patients with identifiable LGE-defined gaps in lesions responded successfully to single re-isolation procedures.

synapsesocial.com/papers/6997fa12ad1d9b11b3452fe4 https://doi.org/10.1007/s10554-026-03655-3

Topics

Atrial fibrillation Persistent AF management AF ablation outcomes Anticoagulation in AF

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Cardiac magnetic resonance imaging for post-ablation lesion assessment and guiding re-ablation strategies in patients with paroxysmal atrial fibrillation

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Limitations

Cite This Study

Topics

Cardiac magnetic resonance imaging for post-ablation lesion assessment and guiding re-ablation strategies in patients with paroxysmal atrial fibrillation

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Limitations

Cite This Study

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Topics

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