Overview
Submission Instructions
Recent Publications
Frequently Asked Questions
Research Topics
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Heart Rhythm O2 is an open access companion journal to Heart Rhythm and one of two open access publications of the Heart Rhythm Society. It focuses on cardiac arrhythmias and electrophysiology and publishes original clinical and experimental research, review articles, points-of-view, short reports, commentaries, and letters to the editor. The journal also incorporates content from Cardiovascular Digital Health Journal.
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Subject
Cardiac & Cardiovascular Systems
Impact Factor
2.9
Quartile
Q2
Open Access Type
Open
ISSN
2666-5018
eISSN
2666-5018
Invitation Only
Yes
Cost Range
USD 2600 APC for all articles, excluding taxes; Society Members receive a 25% discount.
Submission Instructions
Heart Rhythm O2 is an invitation-only journal. Submissions are accepted by invitation from the editorial board only. The following article types are accepted:
Original Clinical
Cover Letter
Cover letter is required. Cover letter must confirm that the manuscript is original and that all authors are responsible for the contents and have read and approved the manuscript for submission.
Abstract
Abstract is required. Abstract must be 250 words or fewer. Abstract must be structured. Abstract must be divided into Background, Objective, Methods, Results, and Conclusion.
Manuscript
Manuscript must be 5000 words. Manuscript should be divided into Introduction, Methods, Results, Discussion, and Conclusions, with appropriate subheadings. Manuscript must include 3 to 5 Key Findings submitted as a separate MS Word file and, if generative AI tools were used in manuscript preparation, a section before the references titled 'Declaration of generative AI and AI-assisted technologies in the manuscript preparation process' describing the tool, purpose, and authors’ oversight.
References
References must use numbered citations in consecutive order with superscript Arabic numerals. References must be numbered in order of appearance, list the first 6 authors or the first 3 followed by et al. if there are more than 6, and use Index Medicus abbreviations for periodicals.
Figures & Tables
Original Clinical articles are limited to 8 figures and tables combined. Figures and legends must be included at the end of the main manuscript MS Word file, and source files of figures, tables, and text graphics are also required. Each figure must have its legend on the same page, each table must be on a separate page, and tables must be numbered consecutively in the order cited.
Original Experimental
Cover Letter
A cover letter is required. Cover letter must confirm that the manuscript is original and that all authors are responsible for the contents and have read and approved the manuscript for submission.
Abstract
An abstract is required. Abstract must be 250 words or fewer. Abstract must be structured. Abstract must be divided into Background, Objective, Methods, Results, and Conclusion.
Manuscript
Manuscript must be 5000 words. Manuscript should be divided into Introduction, Methods, Results, Discussion, and Conclusions, with appropriate subheadings. Manuscript must include 3 to 5 Key Findings submitted as a separate MS Word file and, if generative AI tools were used in manuscript preparation, a section titled 'Declaration of generative AI and AI-assisted technologies in the manuscript preparation process' before the references.
References
References must be cited using consecutive superscript Arabic numerals in text and numbered in the reference list in order of appearance, listing the first 6 authors or the first 3 followed by et al. when there are more than 6 authors.
Figures & Tables
Figures and tables are limited to 8 combined. Figures and legends must be included at the end of the main manuscript MS Word file, and source files of figures, tables, and text graphics are also required. Each figure must have a caption and tables must be included on separate pages and numbered consecutively in the order cited.
Topics In Review
Cover Letter
Cover letter is required. Cover letter must confirm that the manuscript is original and that all authors are responsible for the contents and have read and approved the manuscript for submission.
Abstract
Abstract is required. Abstract should be 200 words. Abstract must be unstructured.
Manuscript
Manuscript should be 8000 words or fewer. Manuscript must include 3 to 5 Key Findings submitted as a separate MS Word file and, if generative AI tools were used in manuscript preparation, a section titled 'Declaration of generative AI and AI-assisted technologies in the manuscript preparation process' before the references.
References
References must use a numbered citation style with consecutive superscript Arabic numerals. References must be numbered in order of appearance, list the first 6 authors or the first 3 followed by et al. if there are more than 6, and use Index Medicus abbreviations for periodicals.
Figures & Tables
Topics In Review articles are limited to 8 figures and tables combined. Figures and legends must be included at the end of the main manuscript MS Word file, and source files of figures and tables are also required. Figures must have captions and tables must be numbered consecutively with each table on a separate page.
Digital Health Technologies And Innovation
Cover Letter
A cover letter is required. The cover letter must confirm that the manuscript is original and that all authors are responsible for the contents and have read and approved the manuscript for submission.
Abstract
Abstract requirements are not specified.
Manuscript
Provide 3 to 5 Key Findings as a separate MS Word file and include an AI declaration section before the references if generative AI or AI-assisted technologies were used in manuscript preparation.
References
References must be cited with consecutive superscript Arabic numerals in the text and numbered in the reference list in order of appearance, listing the first 6 authors or the first 3 followed by et al. when there are more than 6 authors.
Figures & Tables
Figures and legends must be included at the end of the main manuscript MS Word file for review, and source files of figures and tables are also required. Each table must appear on a separate page and figures must be numbered according to their sequence in the text with a caption for each figure.
Research Letters
Cover Letter
Cover letter is required. Cover letter must confirm that the manuscript is original and that all authors are responsible for the contents and have read and approved the manuscript for submission.
Abstract
Abstract must not be included.
Manuscript
Manuscript is limited to 800 words including references and legends. Research Letter must not include headings such as Introduction, Methods, Results, and Conclusions and must include a conclusion statement at the end of the article. Manuscript must include 3 to 5 Key Findings submitted as a separate MS Word file and an AI declaration section before the references if generative AI or AI-assisted technologies were used in manuscript preparation.
References
Reference list is limited to a maximum of 5 references. References must be cited numerically in the text using consecutive superscript Arabic numerals and listed in the order of appearance, listing the first 6 authors or the first 3 followed by et al if there are more than 6 authors.
Figures & Tables
Research Letter may include up to 1 figure or up to 1 table. Figures and legends must be included at the end of the main manuscript MS Word file, and source files of figures and tables are also required. Supplementary data is not permitted for Research Letters.
Brief Reports
Cover Letter
Cover letter is required. Cover letter must confirm that the manuscript is original and that all authors are responsible for the contents and have read and approved the manuscript for submission.
Abstract
Abstract must not be included.
Manuscript
Manuscript must be under 1500 total words, including references and tables. Manuscript must include 3 to 5 Key Findings submitted as a separate MS Word file, and any use of generative AI in manuscript preparation must be declared in a separate section before the references.
References
References must be cited with consecutive superscript Arabic numerals in the order they appear in the text, listed in the same order, list the first 6 authors, and if there are more than 6 authors list the first 3 followed by et al.
Figures & Tables
Brief Reports are limited to a combined total of 4 figures and/or tables. Figures and legends must be included at the end of the main manuscript MS Word file, and source files are required whether or not figures are embedded in the text.
Case Reports
Cover Letter
A cover letter is required. The cover letter must confirm that the manuscript is original and that all authors are responsible for the contents and have read and approved the manuscript for submission.
Abstract
Abstract requirements are not specified.
Manuscript
The manuscript must include a separate Declaration of generative AI and AI-assisted technologies in the manuscript preparation process section when applicable and a separate Key Findings file containing 3 to 5 bullet points.
References
References must be cited using consecutive superscript Arabic numerals. References must be numbered in the order of appearance, use Index Medicus journal abbreviations, list the first 6 authors or the first 3 followed by et al. when there are more than 6 authors, and exclude unpublished results and personal communications from the reference list.
Figures & Tables
Figures and legends must be included at the end of the main manuscript Word file, and source files of figures and tables are also required. Figures must be numbered according to their sequence in the text and tables must be numbered consecutively with each table on a separate page.
Design Papers
Cover Letter
A cover letter is required. The cover letter must confirm that the manuscript is original and that all authors are responsible for the contents and have read and approved the manuscript for submission.
Abstract
An abstract is required. The abstract must be 250 words or fewer. The abstract must be structured. The abstract must be divided into Background, Objective, Methods, Results, and Conclusion.
Manuscript
The manuscript must be 5000 words or fewer. Design Papers should describe proper structures such as DSMB, executive oversight committee, and steering committee, and should provide trial structure and funding. The manuscript must include 5–10 keywords after the abstract, a separate Key Findings file with 3–5 bullet points, and a declaration of generative AI and AI-assisted technologies in the manuscript preparation process before the references if applicable.
References
References must be cited numerically as consecutive superscript Arabic numerals in the order they appear, and the reference list must be numbered in that same order with the first 6 authors listed or the first 3 followed by et al. when there are more than 6 authors.
Figures & Tables
Design Papers are limited to 8 figures and tables combined. Figures and legends must be included at the end of the main manuscript file, and source files for figures and tables are also required. Each figure must have an editable caption, and tables must be numbered consecutively and placed on separate pages.
Letters To The Editor
Cover Letter
Cover letter is required. Cover letter must confirm that the manuscript is original and that all authors are responsible for the contents and have read and approved the manuscript for submission.
Abstract
Abstract requirements are not specified.
Manuscript
Letters to the Editor must not exceed 400 words excluding the title page. Letters to the Editor may refer to papers published within the previous 6 months and must not contain original data. Manuscript must include 3 to 5 Key Findings submitted as a separate MS Word file and, if generative AI tools were used in manuscript preparation, a separate declaration section before the references using the specified title.
References
Letters to the Editor are limited to 10 references. References must be cited as consecutive superscript Arabic numerals, numbered in the reference list in order of appearance, list the first 6 authors, and if there are more than 6 authors list the first 3 followed by et al.
Figures & Tables
Letters to the Editor must not contain figures. Figures and legends must be included at the end of the main manuscript MS Word file for review, and source files are required whether or not figures are embedded in the text.
Replies To The Editor
Cover Letter
Cover letter is required. Cover letter must confirm that the manuscript is original and that all authors are responsible for the contents and have read and approved the manuscript for submission.
Abstract
Abstract is not required.
Manuscript
Manuscript must include a separate 'Declaration of generative AI and AI-assisted technologies in the manuscript preparation process' section before the references when generative AI tools were used, and a bulleted Key Findings file containing 3 to 5 items must be submitted separately.
References
References must be cited with consecutive superscript Arabic numerals and numbered in the reference list in order of appearance, listing the first 6 authors or, for more than 6 authors, the first 3 followed by et al.
Figures & Tables
Figures and legends must be included at the end of the main manuscript MS Word file for review ease, although source files are also required. Each table must be on a separate page, and figures must be numbered according to their sequence in the text with a caption for each illustration.
Recent Publications
Remifentanil-Based Conscious Sedation for Pulsed Field Ablation of Atrial Fibrillation
Moritz Rothe, Andreas A. Boehmer, Nodira Yuldosheva, Jonathan Kluß, Christoph Keim, Peter Weiss, Bianca C. Dobre, Bernhard M. Kaess, Joachim R. Ehrlich
10.1016/j.hroo.2026.10.008
View Publication
Combined Cardiac and Autonomic remodeling facilitates Torsade de Pointes arrhythmias in anesthetized, chronic AV-block dogs
Valerie Y.H. van Weperen, Alexandre Bossu, Henriette D.M. Beekman, Veronique M.F. Meijborg, Claire Mackaaij, Joanne J.A. van Bavel, Marcel G.J. Nederhoff, Toon A.B. van Veen, Ruben Coronel, Marcel A.G. van der Heyden, Marc A. Vos
10.1016/j.hroo.2026.10.007
View Publication
Procedural Time Predictability with Pulsed Field Ablation Compared with Thermal Ablation: Real-World Evidence in Paroxysmal and Persistent Atrial Fibrillation.
Ahmad Awada, Giampaolo Vetta, Pablo E. Bretos-Azcona, Antonio Sorgente, Juan Sieira, Erwin Stroker, Rami Daya, Ingrid Overeinder, Luigi Pannone, Ludovica Carmagnola, Paul A. Calburean, Luca Canovi, Ivan Eltsov, Tommaso Sattin, Domenico Laviola, Francesco De Vuono, Alvise Del Monte, Lorenzo Marcon, Edona Berisha, Gezim Bala, Andrea Sarkozy, Carlo de Asmundis, Gian-Battista Chierchia, Domenico G. Della Rocca
10.1016/j.hroo.2026.10.002
View Publication
Real-World Performance and Diagnostic Yield Gains of a Next Generation Patch-Based 14-day Uninterrupted Ambulatory ECG Monitor
Bradley P. Knight, Relana Pinkerton, Jeffrey Ellis, Jeffrey M. Ashburner, Oussama M. Wazni, Rod S. Passman, Mintu P. Turakhia, Suneet Mittal
10.1016/j.hroo.2026.10.005
View Publication
Impact of Atrial Fibrillation on Clinical Outcome in Patients with Peripartum Cardiomyopathy
Cevher Ozcan, Remzi Baris, Rishi Arora
10.1016/j.hroo.2026.10.006
View Publication
Frequently asked questions
How long does it take to publish?
5 days from submission to first decision; 25 days from submission to decision after review; 53 days from submission to acceptance.
Reformat to Heart Rhythm O2 using Livewrite PremiumIs a cover letter required?
A cover letter is required to confirm that the manuscript is original and that all authors are responsible for the contents and have read and approved the submission. Fellows Corner submissions should state the fellowship program in the cover letter.
Reformat to Heart Rhythm O2 using Livewrite PremiumWhat are the publication costs?
USD 2600 APC for all articles, excluding taxes; Society Members receive a 25% discount.
Reformat to Heart Rhythm O2 using Livewrite PremiumResearch Topics
Cardiac Arrhythmias and Treatments
Atrial Fibrillation Management and Outcomes
Cardiac pacing and defibrillation studies
Cardiac electrophysiology and arrhythmias
ECG Monitoring and Analysis
Cardiovascular Function and Risk Factors
Mechanical Circulatory Support Devices
Cardiovascular Syncope and Autonomic Disorders
Cardiac Structural Anomalies and Repair
Cardiovascular Disease and Adiposity
Cardiac Valve Diseases and Treatments
Heart Rate Variability and Autonomic Control
Cardiac Imaging and Diagnostics
Cardiovascular Effects of Exercise
Microbial Inactivation Methods
Heart Failure Treatment and Management
Cardiomyopathy and Myosin Studies
Pericarditis and Cardiac Tamponade
Cardiac Arrest and Resuscitation
Healthcare Technology and Patient Monitoring
Congenital Heart Disease Studies
Venous Thromboembolism Diagnosis and Management
Diverse Scientific and Economic Studies
Coronary Interventions and Diagnostics
Heart rate and cardiovascular health