Clinical trial Recruiting at 1 site Interventional Ages 18 to 80

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 typeInterventional
Ages18 Years to 80 Years
SexAll
Enrollment100 (estimated)
SponsorAssaf-Harofeh Medical Center
Government
Locations1 site (Be’er Ya‘aqov)
StatusRecruiting
StartedMay 5, 2026
Main results expectedApril 19, 2027
Study endsApril 19, 2028
Registry record updatedOctober 20, 2026
Trial IDNCT07580547 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

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.