Sex-based differences in AF wiring and how they affect outcomes
Official title: Sex-Based Disparities in the Electrophysiological Substrate for Atrial Fibrillation and Its Impact on Clinical Outcomes
Run by Assaf-Harofeh Medical Center · NCT07580547 · Data updated 2026-11-12
This study tests whether women have more unmapped extra-pulmonary AF triggers than men during a first-time AF ablation.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 80 Years |
| Sex | All |
| Enrollment | 100 (estimated) |
| Sponsor | Assaf-Harofeh Medical Center Government |
| Locations | 1 site (Be’er Ya‘aqov) |
| Status | Recruiting |
| Started | May 5, 2026 |
| Main results expected | April 19, 2027 |
| Study ends | April 19, 2028 |
| Registry record updated | October 20, 2026 |
| Trial ID | NCT07580547 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults 18–80 with symptomatic paroxysmal or persistent AF undergoing first-time catheter ablation.
✕Probably not a fit
Patients without unmapped extra-PV activation or those not undergoing PVI may have no clear benefit from this specific mapping focus.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
DISPARITY-AF is a prospective, single-center registry that looks at sex differences in the electrophysiological drivers of atrial fibrillation. In patients undergoing a first-time pulmonary vein isolation, the researchers will perform comprehensive mapping after ablation to identify steep repolarization gradients and extra-PV AF initiation sites. The goal is to see if women have a higher burden of unmapped triggers that could explain lower long-term success rates. Mapping uses approved systems and catheters that are routinely used at the center. Outcomes will be correlated with mapping findings to inform future ablation strategies.
Why it matters
Potential benefit: If successful, the study could help tailor ablation approaches to sex-specific substrate differences and improve long-term AF freedom.
How similar studies have gone: Prior research has shown sex-related differences in AF outcomes; this study explores a specific unmapped substrate hypothesis that remains to be firmly established.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Age between 18 and 80 years. * Male or Female sex. * Symptomatic paroxysmal or persistent AF indicated for a first-time catheter ablation. * Ability to provide written informed consent. Exclusion Criteria: * Prior catheter ablation for AF or surgical MAZE. * Long-standing persistent AF (\>12 months). * Presence of intracardiac thrombus or contraindication to systemic anticoagulation. * Pregnant women and patients not able to provide an informed consent
Where it's running
-
Shamir Medical Center
Be’er Ya‘aqov, Israel Recruiting
Study contacts
- Study coordinator: Anat Milman, MD
- Email: anatmi@shamir.gov.il
- Phone: +972-54-3166651
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.