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Author Guidelines

Instructions for Authors

 Rhythmos, a peer-reviewed journal, is the official publication of the Third Department of Cardiology of Athens University School of Medicine.

Rhythmos provides a forum for publication of important scientific developments in the field of Cardiac Electrophysiology and Pacing and Cardiology in general. The Journal publishes both basic and clinical papers of scientific merit devoted to all fields of Cardiovascular Medicine . The types of articles include: original research, reviews, overviews, interviews, editorials, EP & Pacing News, Cardiovascular News, case reports, images, letters to the editor. All submitted manuscripts must be accompanied by statements that the article has been neither published previously nor concurrently submitted for publication elsewhere and that all authors have reviewed and approved the final draft of the manuscript. Any potential conflict of interest must be disclosed.

A cover letter should include the name, complete mailing address, phone and fax numbers, and the e-mail address of the corresponding author, who should sign on behalf of all co-authors. Authorship should be limited to those who have contributed substantially to the design of the study, analysis of the data, and writing of the manuscript. All manuscripts are subjected to peer review. Authors may suggest the names and e-mail of potential reviewers; Rhythmos reserves the right of final selection.

It is recommended that all manuscripts be submitted online at the Journal’s web site ( or sent to: [email protected]  or to the Editor-in-Chief ([email protected]

 Statement of Purpose: Rhythmos publish original, peer-reviewed articles on all aspects of clinical and basic science of cardiovascular medicine. Review articles may be requested, but unsolicited submissions will also be considered. All articles will go through the peer-review process. Articles from the Editors’ departments will be processed through a guest editor.


a. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

b. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.

c. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

Manuscript Processing charges: none

Manuscript Preparation: Authors should submit an electronic version of the files of their manuscript. For text files, Microsoft Word (.doc) files are preferred. For figure files tif or jpeg files with analysis of >300 dpi are preferred. Manuscripts must be double-spaced, single columned with a minimum of 1-inch (2.5 cm) margins on all four edges, with use of Times New Roman font and a font size of 12 pt. Arrange the contents as follows:

  1. Title page
  2. Abstract
  3. Key words
  4. List of abbreviations (keep to a minimum)
  5. Text
  6. References
  7. Tables
  8. Figure legends
  9. Figures


Manuscript Format

Title Page: Include a brief and descriptive title of the article, a short title of <50 words, authors full names, academic degrees, hospital and academic affiliations, acknowledgment of all sources of financial support, and the name, address, phone and fax numbers, and e-mail of the author responsible for correspondence and/or reprint requests.

Abstract: Include a brief structured abstract with no references, of <250 words for original articles and reviews & < 100 words for the rest. Structure the abstract as follows: Background, Objective, Methods, Results, and Conclusion. Conclusion should be based solely on the findings of the article and state the importance and implications of the findings. Keep abbreviations to an absolute minimum, spell them out when first mentioned int he text, Use generic names of drugs. List 5-10 key words for indexing purposes.

List of Abbreviations: use only commonly accepted abbreviations. Keep to a minimum.

Text: Organize text into sections: Introduction, Methods, Results, Discussion and Conclusion, with appropriate subheadings. Explain abbreviations when first mentioned, followed by the abbreviation in parentheses. References, tables, and figures should be cited in numerical order. Avoid jargon, clichés, laboratory slang, underlining, italics, bold face typing or capitalizing. References to pacemakers, defibrillators, other devices and device leads must adhere to code structures and usage conventions. Place acknowledgments at the end of the text, before references. Authors whose native language is not English are strongly advised to seek proper professional assistance. In general the manuscript should not exceed 30 double-spaced typed pages, 5 figures and 50 references. More references are only allowed in comprehensive review articles.

References: Number references in the order in which they are cited in the text; use superscript numerals for text citations. Include references to unpublished material or personal communications in the text in parentheses. Abbreviate titles of journals according to the style of Index Medicus, National Library of Medicine. In the reference list, include names and initials of all authors; if more than 6, list first 3 followed by “et al”. Include the title, source, year, volume and inclusive page numbers, following the format and punctuation shown herein:

Journal article: 1. Manolis AS, Wang PJ, Estes NAM III. Radiofrequency catheter ablation for cardiac tachyarrhythmias. Ann Intern Med 1994; 121:452-461.

Book chapter: 2. Manolis AS. Implantable cardioverter defibrillator leads. In: Estes NAM, Manolis AS, Wang PJ (eds). Implantable Cardioverter-Defibrillators: A Comprehensive Textbook, Marcel Dekker, Inc., New York, NY, 1994, pp. 607-633.

Table(s): Tables must be self-explanatory and supplement, not duplicate, the text. Each table should be typed on a separate page and designed for economy of space and readability. Provide a title on top for each table. Notes designed in the tables and all abbreviations should be defined in a footnote. Abbreviations should be identified in alphabetical order. Footnotes should be used in the following order: *, †, †, §, ║,¶. Number tables consecutively, with Arabic numerals, in the order of their citation in the text.

Policy/Letter of Submission: Manuscripts submitted must be original, with no portion under simultaneous consideration for publication elsewhere or previously published, except for an abstract of <400 words. Include only authors who have made an important contribution to the study and are thoroughly familiar with the data. All authors are responsible for the contents and must have read and approved the manuscript and conform to the Uniform Requirements for Manuscripts Submitted to Biomedical Journals published in the Annals of Internal Medicine 1977;126:36-47. Studies involving experimental animals and humans must conform to the guiding principles of the Declaration of Helsinki, and human subjects must have given informed consent of a study that has been approved by the Institutional Committee on Human Research at the authors’ institution. Any financial or other relations must be disclosed. Letters of submission should state and confirm the above. Use of previously published graphic and tabular material is discouraged. Authors are responsible for obtaining permission for re-use of material (illustrations, tables, quotes) from other sources. Permission letters from copyright holder and the author of the original source, along with complete bibliographic information, must be submitted with the manuscript. Prior published work should be properly acknowledged and cited.

Open Access: users are free to read, download, copy, distribute, print, search, or link to the full texts of the articles and readers are allowed to use them for educational purposes and any other lawful purpose, but not commercial use  

Manuscript Categories:

Reviews: Review articles should be no more than 10,000 total words, including references, tables, and figures. References are limited to 100 and must be no older than 10 years old. Use other articles to incorporate older references.

Case reports: case reports are limited to 5 authors, total of 10 double-spaced pages, including text, <30 references, 1-2 tables, figure legends and a maximum of 5 figures.

Images in Medicine: submissions to Images should be limited to a double-spaced type-written narrative and 3 illustration panels and 3 authors. Figure legends are not used, while reference citations are limited to a maximum of 5.

Letters to the Editor: Letters should be double-spaced, not exceeding 1000 words, and should address issues reported to previously published articles in the Journal. Research Letters could refer to novel findings and include one table, one figure and <15 references.

Interviews: should have the written approval of the interviewee

Cardiovascular News: should be critical and brief and succinct presentation of the recent literature with descriptive headings

Editorials: should concern contemporary topics of wider interest

 Revisions: revised manuscripts accepted for publication should be submitted electronically, either through our website or by e-mail.

Plagiarism: all manuscripts are checked via plagiarism detection software

Reprints: a form for ordering reprints will accompany the approval copy of page proofs. No complimentary copies of published papers will be provided. A pdf copy of the article will be available for the corresponding author to download.

 Send material to:


Editorial Office

Third department of Cardiology

Ippokrateio Hospital of Athens

Vas. Sofias 114

Athens 115 27, Greece

Telephone: +30-213- 208 8470

Fax: +30-213-208 8676

E-mail: [email protected]  / [email protected]



Submission Preparation Checklist

All submissions must meet the following requirements.

  • The submission has not been previously published, nor is it before another journal for consideration (or an explanation has been provided in Comments to the Editor).
  • The text adheres to the stylistic and bibliographic requirements outlined in the Author Guidelines, which is found in About the Journal.
  • Any potential conflict of interest has been separately stated. Information about funding sources has been separately included

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