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Call for Late-Breaking Clinical Trials and Science

The Heart Rhythm Society recognizes that stimulating and rapidly developing research was not completed in time for the December 2023 abstract submission deadline. To highlight this timely innovative work at Heart Rhythm 2024, the Heart Rhythm Program Committee will develop peer-reviewed sessions consisting of late-breaking science and late-breaking clinical trials.


  1. Late-Breaking Randomized Clinical Trials: First-time presentation of primary or major secondary results from a prospective, randomized clinical trial
  2. Late-Breaking Clinical Innovations: First-time presentation of results of clinical applications of novel therapeutic or diagnostic approaches to heart rhythm disorders
  3. Late-Breaking Clinical Trial Updates and Registries: Follow-up analyses from prospective, randomized clinical trials or first-time presentation of high-impact information from multicenter clinical registries or observational studies
  4. Late-Breaking Science: Innovative research that includes the latest breakthroughs in basic and/or clinical science that could have a significant impact on clinical practice

Benefits of Presenting

  • Save on Registration: Late Breaking Trials and Science Presenters enjoy a 75% discount on their Heart Rhythm 2024 registration.*

  • Publish Your Science: Accepted submissions will be published in Heart Rhythm, the only academic publication that serves the entire EP community.

  • Advance Your Career: Among the EP community, the annual Heart Rhythm meeting is the recognized forum for showcasing research that will advance the field. Demonstrate your value and the impact of your findings to the audience that matters most to your professional development.

  • Increase Your Visibility:

    • Heart Rhythm 2024 will attract a diverse global audience from physicians and allied professionals to scientists and industry partners. As a selected Late Breaking Trials and Science Presenter, you will have the opportunity to present your findings to thousands of cardiac rhythm professionals from 90+ countries. With opportunities for attendees to watch in person or online via livestreaming, Late Breaking sessions are among the highest-viewed content from the meeting!

    • Additionally, you will be able to extend your reach via far-reaching media buzz. Heart Rhythm 2023 generated hundreds of millions of impressions worldwide via media outlets and social media.

*Already registered? If your late-breaking abstract is selected for presentation, HRS will automatically refund the difference in your registration fees. If you are not registered at the time of being selected to present, your discount will automatically be applied at checkout when you register.

Submission Fees

Each late-breaking abstract submission requires a fee of $175 for HRS members and $250 for nonmembers. These submission fees directly fund travel grants to sponsor EP fellows-in-training from around the globe so they can attend Heart Rhythm 2024 in person, and support enhancements to the presentation of abstracts during the meeting.

View the 2024 Late Breaking Submission Guidelines here for additional details including author eligibility, withdrawal, and embargo policies.

Important Embargo Dates:

  • General abstracts: Thursday, May 16, 2024 at 1:00 PM ET
  • LBCTs being presented on Friday: Friday, May 17, 2024 at 9:30 AM ET
  • LBCTs being presented on Saturday: Saturday, May 18, 2024 at 8:00 AM ET
  • LBCTs being presented on Sunday: Sunday, May 10, 2024 at 8:00 AM ET

If you have any questions, please email abstracts@HRSonline.org. 

Submission Eligibility

Late Breaking abstracts are not eligible if:

  • Already accepted for Heart Rhythm 2024
  • Manuscript will be published prior to Heart Rhythm 2024 (May 16 - 19, 2024)
  • Trial results have been presented at a major international meeting prior to Heart Rhythm 2024
  • Appear to be redundant versions of a single study and/or selling a product versus discussing the science

Evaluation Criteria

  1. Impact of the research
  2. Novelty and rigor of the study design
  3. Clinical endpoints
  4. Quality of the statistical plan


Frequently Asked Questions (FAQs)

Can I submit an abstract or case report if it has been presented previously?

Can I submit an abstract if it has been published previously?

Am I allowed to submit my abstract to other meetings or journals?

How do I include a table with my submission?

What is the character count for submission? What is included in the character count?

Do all authors have to be members of HRS?

Do all co-authors need to submit disclosures?

Is the first author the presenting author?

Can I change the author order in my submission?

Do you accept encore abstracts?

If my abstract is accepted, how and when will I be notified?

What is the fee for a LBCT submission?

I'm not sure of the format for an abstract submission. Do you have any sample abstract submissions to view?

How will I know if my submitted abstract is complete?

Can I make edits to my abstract after submission?

Does HRS have a policy for use of AI in submitted abstracts?

Who will be notified if the LBCT submission is accepted?

Do I need to get a signed patient consent form for my case submission?

What are the Embargo dates for general abstracts and LBCT's?