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Author Guidelines


Kardiologia Polska (Kardiol Pol) is the official journal of the Polish Cardiac Society (PTK, Polskie Towarzystwo Kardiologiczne). This monthly journal aims to provide a platform for sharing knowledge in cardiology, from basic science to translational and clinical research on cardiovascular diseases.

All accepted articles will be fully citable with a DOI (digital object identifier) number and will be indexed on PubMed.

Papers that do not adhere to the instructions listed below will be returned for revision before assessment.


Conflict of interest

All authors must declare any conflicts of interest during submission of their manuscript via the online submission system. The corresponding author is responsible for highlighting any conflicts of interest in their manuscript accordingly, i.e. as a statement of conflict of interest.

Any potential conflict of interest should be declared, including (but not limited to) author shareholding in or receipt of lecture honoraria, travel expenses coverage, research grants or consultancy fee from a company whose product features in the submitted manuscript or which manufactures a competing product.

If no conflict of interest is declared, this will be stated in the article using the following wording:

'Conflict of interest: none declared'

The Polish Cardiac Society is the owner of all copyright to any work published in Kardiol Pol. Once the manuscript has been accepted for publication, the corresponding author will be asked to fax or e‑mail a signed copy of the Copyright Transfer Agreement. The article or its parts should not be copied or reproduced in other publications without written permission.

To get the permission, please contact the journal office:

Submission of manuscripts

All manuscripts should be accompanied by a covering letter from the corresponding author to the Editor-in-Chief. The covering letter should include the manuscript title and a brief summary of major novel findings of the study, usually up to five sentences. We encourage all authors to tell us why they feel the submitted article contains novel, potentially clinically relevant findings and why it should be published in our journal (e.g. unique study population, novel methods or management strategies, etc.). The covering letter should state clearly that all authors have read the manuscript and approved its contents, and that the paper has not been published before or submitted for publication elsewhere.

Please supply the full names and email addresses of two preferred referees to whom your manuscript may be sent for review in the 'Enter Comments' section of your electronic submission system. Authors are also allowed to provide the names of non-preferred referees and ask for their exclusion from the reviewing process.

Submissions to the journal should be written in scientific English, preferably with British spelling. Authors who are not native speakers of English are strongly encouraged to use professional language-editing services prior to submission. The journal does not provide translation services. Manuscripts written in poor English will be rejected without peer review.

Authors must specify the category for which their submission is intended.

For assistance with the electronic submission process and any other enquiries, please contact the editorial office (email:, phone: +48 12 293 41 20).

Online submission

First-time users must click ‘Register’ on the navigation menu at the top of the screen, and enter the required information. The system will send you an automatic e-mail with your username and password. Detailed guidelines are available at the editorial system site.

You will be asked to supply information about your manuscript and then attach your files containing the text and any figures and tables. The system will create a PDF from the data submitted, which is the format in which the manuscript will be made available to the editors and referees during the peer-review process.

The manuscript text, references, and figure legends should be prepared in a single file. Papers should be submitted as Microsoft Word documents.

Any appendices must be supplied separately, and will be published as online-only supplementary data. Please use the word “Supplementary” for any references to appendices in the manuscript, e.g. Supplementary Table S1, Supplementary Appendix S2.

Tables and figures may be included in the manuscript file but must appear at the end of the text on separate sheets (and not embedded in the text).

If preferred, tables and illustrations may be prepared and submitted in separate files. Electronically submitted figures should be in high resolution and in one of the following formats: tiff, bitmap (.bmp), jpeg (.jpg), or as PowerPoint files. Tables must be submitted as Microsoft Word tables.

The author will be required to enter the Abstract, and Keywords during the submission process. These may be copied and pasted from the manuscript document but must still appear in the manuscript itself.

Article categories

Kardiol Pol accepts the following categories of articles:

Original Articles: This category contains innovative interesting studies of appropriate methodology and statistical analysis, ranging from observational to large-scale clinical trials. Papers dealing with trial designs or confirmatory studies are not encouraged. Articles are limited to 4000 words, including references, tables, and figure legends, up to eight figures or tables, and up to 50 references. Authors should include one unstructured paragraph on a separate page outlining the key novel findings with their potential relevance to clinical practice or pathophysiology of cardiovascular diseases, intended for non-specialists in cardiology. The paragraph should come under the heading “What’s New"? Following the title page and should have no more than 150 words in total.

Reviews: This category contains comprehensive reviews that summarise and critically evaluate research in the field addressed and identify future implications. Review articles will be solicited by the Editor-in-Chief. However, unsolicited reviews will be considered if they are submitted by experts in the field with a strong track record of publications indexed in PubMed. A presubmission enquiry  should contain the title of the manuscript, abstract, and a list of publications for each individual author. Reviews should not exceed 5000 words, 10 figures or tables, and 100 references.

Short Communications: This category ranges from case series to preliminary results or subgroup analysis from large-scale clinical trials or observational studies. Short communications do not contain an abstract or keywords and should be concise, namely up to 1500 words (including references), one figure or table, and no more than 15 references.

Editorials: Papers in this section will provide comment, context, and critique of articles published in Kardiol Pol. Editorials will be solicited by the editors. Editorials should not exceed 1000 words (without references) and 15 references, including a reference to the original article. An abstract and keywords are not required.

Clinical Vignette: This category is intended for brief highly informative cases illustrated with interesting or rare images with detailed legends. Electrocardiograms, echocardiograms, CT scans, X-rays, pathology specimens, and other imaging techniques may be used in this category. Images containing more than six panels are discouraged. A maximum of six authors are allowed. The article will be limited to 750 words and up to five references. The submission of videos is encouraged; these will be hosted as supplementary data.

Correspondence: Letters to the Editor must not exceed 750 words and should focus on a specific article published in Kardiol Pol within the preceding three months. No original data may be included. The number of references for this type of paper is restricted to a maximum of five. The authors of the article cited will be invited to reply within 14 days. If they decline this invitation or do not respond to it, information regarding this issue will be provided below the Letter to the Editor.

Case reports: Case reports are currently not accepted for peer review and publication.


Each author should have participated sufficiently in the work to take public responsibility for appropriate portions of the content. All authors should have contributed substantially to the concept and design of the study, or data collection, or data analysis (including statistics) and interpretation, or drafting the article, or revising it critically for essential intellectual content. Each author should approve the final version of the manuscript. Additional authors or contributors who do not fulfil the above criteria, e.g. technicians, persons involved in patient recruitment or figure drafting etc., should be acknowledged in the Acknowledgments section. If required, the two first authors may be listed as the authors who equally contributed to the submitted work and may be considered the “first” authors; this should be clearly stated on the title page with an asterisk and an appropriate statement below the affiliations.

Manuscript preparation


The manuscript should be typed on one side, double spaced using 2.5 cm wide margins all round with right margins left unjustified. The Times New Roman font (12 pt) should be used in the whole manuscript, including references, tables, and figure legends, and the Symbol font for Greek and special characters. Abbreviations should be used only if necessary and if they appear at least three times in the manuscript. Please avoid providing the same data in the text and tables.

All original articles should contain the following sections: Title page, Structured Abstract and Keywords, Introduction, Methods, Results, Discussion, Acknowledgements, References, Appendix, Tables, and Figure legends. References, figures, and tables should be numbered in the order in which they are cited in the text. The abstract (maximum 250 words) should be structured under the headings (1) Background, (2) Aims, (3) Methods, (4) Results, and (5) Conclusions, followed by a list of three to five keywords. All abbreviations used in the abstract should be spelled out. The number of abbreviations should be restricted a minimum.

Generic names should be used for drugs and instruments whenever possible. The statistical analysis section is required in all original articles. Power calculation should be presented whenever necessary.

Review articles should contain the following sections: Title page, Structured Abstract and Keywords, the main body of the manuscript divided preferably into sections with subtitles, Acknowledgements, References, Appendix, Tables, and Figure legends. References, figures, and tables should be numbered in the order in which they are cited in the text. Generic names should be used for drugs and instruments whenever possible.

Short communications should contain the following sections: Title page, Introduction, Methods, Results and Discussion (combined), Acknowledgements, References, Appendix, Table, and Figure legend.

Title page

The title page should bear: (a) title, (b) name(s) of authors, (c) affiliations of all authors, (d) brief title (up to 6 words), (e) name of the corresponding author to whom proofs should be sent, with complete postal address, telephone and fax numbers, and e-mail.

Units of measure

Laboratory values should be expressed using SI units in lower‑case letters (e.g. mmol/L). Blood pressure should be given in millimetres of mercury and body temperature in degrees Celsius. If conventional units are used, relevant SI conversion factors should be given in parentheses only at first mention and in table footnotes (e.g. “Conversion factors to SI units are as follows: for glucose [in mg/dL] - 0.0551, ...”).


Acknowledgements, including any support in the form of grants, equipment, or drugs, should be provided at the end of the text before References.


References are identified in the text by Arabic numerals and numbered in the order cited. References are typed double spaced on sheets separate from the text in the Vancouver style. Complete information should be given for each reference, including title of article, abbreviated journal title, and inclusive page numbers. If a journal is not listed in the PubMed database, its full name should be given. The first three authors should be listed, followed by et al.

A few examples of articles in the proper reference style in Kardiol Pol are presented below:

Feldman T, Kar S, Elmariah S, et al. EVEREST II Investigators. Randomised comparison of percutaneous repair and surgery for mitral regurgitation: five-year results of EVEREST II. J Am Coll Cardiol. 2015; 66(25): 2844–2854, doi: 10.1016/j.jacc.2015.10.018.

Marijon E, Mirabel M, Celermajer D, et al. Rheumatic heart disease. Lancet. 2012; 379(9819): 953–964, doi: 10.1016/s0140- 6736(11)61171-9.

Personal communications, manuscripts in preparation, and other unpublished data that cannot be found in available databases are not cited in the reference list but are mentioned in the text in parentheses; the main author’s name should be provided. Articles published in languages other than English should contain their titles in English and presented in square parentheses.


All illustrations should be referred to as figures and should be numbered in a single sequence in the order in which they are mentioned in the text. Abbreviations in figures or legends should be kept to a minimum and spelled out to make figures self-explanatory.

Electronically submitted figures should be in high resolution and in one of the following formats: tiff, jpeg (.jpg), or portable data format (.pdf). The resolution required for publication is 600 dpi or more.

There is no charge for colour figures in Kardiol Pol.

The Publisher may re-draw any charts or graphs using the colour palette where necessary during the production process. Authors will have the opportunity to correct any inappropriate changes at the proof correction stage.

If there is difficulty in submitting figures electronically, please contact the Editorial Office.


Tables are typed on separate sheets with the table number (in Arabic numerals) and title above and any explanatory notes below. All abbreviations in tables should be spelled out in a table footnote and arranged in an alphabetical order. If the abbreviations appeared in two or more tables, they may be presented below the second table using a phrase: “Abbreviations see Table 1”. Then additional abbreviations should be presented if they were absent in previous tables.

Supplementary data

Supporting material that is not essential for inclusion in the full text of the manuscript but would nevertheless benefit the reader can be made available by the publisher as online-only content, linked to the online manuscript. The material should contain data that is additional or complementary and directly relevant to the article content, for example detailed methods, extended data analysis, or additional figures.

All text and figures must be prepared as required for the full text and submitted at the same time as the main manuscript for peer review. It cannot be altered or replaced after the paper has been accepted for publication. Please indicate clearly the material intended as Supplementary data upon submission. The Supplementary data should be referred to in the main manuscript, for example by citing consecutively supplemental tables and figures.

Experimental Ethics and Reporting

Studies should comply with the Declaration of Helsinki, and the research protocol must be approved by the locally appointed Ethics Committee. Informed consent must be obtained from the subjects (or their legally authorised representative). The data regarding this issue must be stated in the Methods section of the manuscript. In the case of animal experimentation, authors should also obtain ethical and /or legal approval prior to conducting the research.

Clinical Trials

Randomised clinical trials should be reported according to CONSORT guidelines. All clinical trials, in particular those involving pharmaceuticals, devices, or aspects relating to nutrition, should be registered prospectively in publically accessible databases (such as and, and the paper should include registration numbers and the name of the register.

Informed Patient Consent

Authors should observe high standards with respect to publication ethics as set out by the Committee on Publication Ethics (COPE) and ICMJE recommendations for reporting about patients. Patients have a right to privacy that should not be infringed without prior informed consent.

Identifying information should not be published in written descriptions, photographs, and pedigrees unless the information is essential for scientific purposes and the patient (or parent or guardian) has given written informed consent for publication. Informed consent for this purpose requires the patient be presented in the manuscript.

Identifying details should be omitted if they are not essential, but patient data should never be altered or falsified to attain anonymity.

The Editor in Chief reserves the right to reject papers for which the ethical aspects may raise doubts. Please contact the Editorial Office if you have any queries regarding consent.


In order to meet your funding requirements authors are required to name their funding sources, or state if there are none, during the submission process.

Details of all funding sources for the work in question should be given in the 'Acknowledgements' section.

The following rules should be followed:

  • The sentence should begin: ‘This work was supported by…’
  • The full official funding agency name should be given, i.e. ‘National Institutes of Health’ not ‘NIH'. Grant numbers should be complete and accurate and provided in brackets as follows: ‘[grant number ABX CDXXXXXX]’.
  • Multiple grant numbers should be separated by a comma as follows: ‘[grant numbers ABX CDXXXXXX, EFX GHXXXXXX]’.
  • Agencies should be separated by a semi-colon (plus ‘and’ before the last funding agency).
  • Where individuals need to be specified for certain sources of funding the following text should be added after the relevant agency or grant number ‘to [author initials]’.

Declaration by authors

The Author Declaration Form stating that the authors have seen and approved the paper and that the work has not been, and will not be, published elsewhere, should be completed, signed by the corresponding author, and sent via e-mail to the editorial office.


If illustrations or tables used in the manuscript come from other papers or published sources, written permission must be obtained from the owner of copyright, usually a publisher or author, and a credit line giving the source added to the legend. In the case of short quotations, it is sufficient to add a bibliographic credit. Permission letters for reproduced text or illustrations must accompany the manuscript. The inability to obtain permission should be clearly pointed out.


PDF proofs will be e-mailed to the corresponding author. The accepted manuscript will be edited by in-house editors to ensure consistency with the journal formatting style. It is the responsibility of the corresponding author to check proofs carefully, in particular, to check typesetting, editing, and completeness and correctness of the text, tables, and figures. Major alterations (other than corrections of typesetting errors) instigated by the author at proof stage are not allowed. Proofs should be returned to the publisher within three working days of receipt. Proofs are also read by the Editor-in-Chief, who reserves the right of final decision. Requests to publish corrections of errors after the manuscript has been published should be sent to the email address:

Author statement

Submission Preparation Checklist

As part of the submission process, authors are required to check off their submission's compliance with all of the following items, and submissions may be returned to authors that do not adhere to these guidelines.

  1. 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).

  2. The submission file is in OpenOffice, Microsoft Word or RTF document file format.

  3. The text is written using font size 12 and double-space between the lines; employs italics, rather than underlining (except with URL addresses); all illustrations, figures, and tables are  attached in separate file(s). Figures should be submitted in separate files.

  4. The text adheres to the stylistic and bibliographic requirements outlined in the Author Guidelines, which is found in About the Journal.

  5. The author statement has been signed by all author(s) and is ready to be downloaded.

Copyright Notice

All articles published by Kardiologia Polska become a property of the Polish Cardiac Society and the Editor. Reprints of both whole articles and extracts, as well as translations to other languages can be produced only after obtaining permission from the Editor.

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