When you organize a revised manuscript, you should carefully follow the instructions given in the editor's letter. With each revision, KCJ requires two versions of the manuscript to be resubmitted: one with changes tracked or highlighted and one clean version of the revised manuscript. In your response to the reviewers’ comments, authors have to address each reviewer comment point-by-point and provide the exact page number(s) and line number(s) where each revision was made in the final clean version of the revised manuscript. Failure to do so will cause a delay in the review of your revision. If references, figures or tables are moved, added, or deleted during the revision process, renumber them to reflect the changes so that all references, figures or tables are cited in numeric order.

Failure to resubmit the revised manuscript within 8 weeks without notification to KCJ is considered to be a withdrawal of the manuscript.

All clinical research must be performed according to the principles embodied in the Declaration of Helsinki: (https://www.wma.net/policies-post/wma-declaration-of-helsinki-ethical-principles-for-medical-research-involving-human-subjects).

Patients have a right to privacy. Therefore, when publishing identifiable images from human research participants, authors must include a statement in the published paper affirming that they have obtained informed consent for publication of the images (unless the consent has waived by an appropriate institutional review board). Images may be cropped to remove nonessential identifying details to protect anonymity but should not be otherwise altered.

Any identifying information, such as patients’ names, initials, hospital numbers, or dates of birth should not be included in images, written descriptions, videos, photographs, and pedigrees unless they are essential for scientific purposes. If identifying characteristics are altered to protect anonymity, authors should provide assurance that alterations do not distort scientific meaning and editors should so note.

Research using animals also should be reviewed by an appropriate committee following the guidelines of the Institutional Animal Care and Use Committee (IACUC). Studies using pathogens requiring a high degree of biosafety should receive permission from a relevant committee such as the Institution Biosafety Committee (IBC).

Authors may be required to provide evidence that they obtained ethical and /or legal approval prior to conducting the research.

All researches involving human subjects, human material, or human data must be approved by an appropriate institutional review board.

For all research involving human subjects, informed consent to participate in the study should be obtained from the subjects (or their legally authorized representative), if not waived by the institutional review board.

A statement about this, including the name of the ethics committee and the reference number, must be stated in the methods of manuscript. If a study has been granted an exemption from requiring ethics approval, this should also be detailed in the manuscript (including the name of the ethics committee that granted the exemption).

In the process of submitting the manuscript, authors will be asked if they have obtained the IRB approval and the reference number need to be provided. The editor of the KCJ may request copies of the informed consent and documents of permission from IRB or related committees.

KCJ follows the recommendations for authorship by the ICMJE, 2019 (http://icmje.org/icmje-recommendations.pdf) and Good Publication Practice Guidelines for Medical Journals 3^rd Edition (KAMJE, 2019, https://www.kamje.or.kr/board/view?b_name=bo_publication&bo_id=13&per_page=).

Authorship credits should be based on 1) substantial contributions to conception or design, acquisition of data, or analysis and interpretation of the data; AND 2) drafting of the manuscript or revising it critically for important intellectual contents; AND 3) final approval of the version to be published; AND 4) agreement to be accountable for all aspects of the work and ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

Authors must meet all of these criteria. In addition, an author should be accountable for the parts of the work he or she has done and should be able to identify which co-authors are responsible for specific other parts of the work. Authors should have confidence in the integrity of the contributions of their co-authors. All those designated as authors should meet all four criteria for authorship, and all who meet the four criteria should be identified as authors. Those who do not meet all four criteria should be acknowledged as contributors not be authors. These authorship criteria are intended to reserve the status of authorship for those who deserve credit and can take responsibility for the work. The criteria are not intended for use as a means to disqualify colleagues from authorship who otherwise meet authorship criteria by denying them the opportunity to meet criterion #2 or 3. Therefore, all individuals who meet the first criterion should have the opportunity to participate in the review, drafting, and final approval of the manuscript.

The corresponding author can be only an author(s) who meets all four criteria and cannot be an author who did not meet any one or more of the criteria. The corresponding author should be available throughout the full processes even after publication. When a study is conducted by a large and multicenter group, the group should identify the individual authors who accept responsibility for the manuscript before submission. When submitting a manuscript authored by a group, the corresponding author should clearly indicate the preferred citation and identify all individual authors as well as group name. Contributors to the study can be listed in an acknowledgment section. Acquisition of funding, collection of data, or general supervision of the research does not meet the authorship criteria, and such parties should not be listed as authors. If the corresponding author requests the addition or removal of authors after submission, the editor will assess the reason and a written document regarding agreement from all co-authors. The KCJ has no responsibility for changes in authorship.

Redundant publication is defined as “reporting (publishing or attempting to publish) substantially the same work more than once, without attribution of the original source(s)”. Characteristics of reports that are substantially similar include the following: (a) “at least one of the authors must be common to all reports (if there are no common authors, it is more likely plagiarism than redundant publication),” (b) “the subjects or study populations are the same or overlapped,” (c) “the methodology is typically identical or nearly so,” and (d) “the results and their interpretation generally vary little, if at all.”

When submitting a manuscript, authors should include a letter informing the editor of any potential overlap with other material already published or material being evaluated for publication and should also state how the manuscript submitted to KCJ differs substantially from other materials. If all or part of your patient population was previously reported, this should be mentioned in the Methods, with citation of the appropriate reference(s).

At manuscript submission, the KCJ requires the corresponding author to summarize all author conflicts of interest disclosures. The conflicts of interest can exist when an author (or author’s institution or employer) has financial or personal relationship or affiliations that could have influence on or bias the authors’ decisions, works, or the manuscript. Such conflicts can be financial support or private connection to pharmaceutical companies, potential pressure from interest groups, or academic benefits.

The KCJ requires complete disclosure of all relevant financial relationships and potential financial conflicts of interest regardless of amount of value. The corresponding author is asked to inform the Editor of all author conflicts of interest that could influence their interpretation of the data.

At manuscript acceptance, the KCJ can ask the authors to confirm and update their disclosure of conflicts of interest online. At the time of publication, the final status of conflicts of interest will be disclosed to the readers on https://www.e-kcj.org. If any author’s disclosure of conflicts of interest is determined to be inaccurate or incomplete after publication, a correction will be published to rectify the original published disclosure statement, and additional action can be taken as necessary.

All sources of funding for the study should be listed explicitly and declared under the title of ‘Funding’. The roles of funders were stated in the manuscript including study design, data collection, analysis, any decisions in publication, or preparation of manuscript.

All forms are now signed and submitted electronically. Once the revision manuscript is submitted, the authors will be sent links to complete the electronic Relationship with Industry form and all authors are required to electronically sign a relationship with industry form. Once completed, the further process will be started. Only authors appearing on the final title page will be sent a form.

The manuscript should be arranged in the following sequence: 1) Title Page, 2) Abstract, 3) Keywords, 4) Text, 5) Acknowledgements (if applicable), 6) Funding, 7) Disclosures 8) References, 9) Figure Legends, 10) Figures, 11) Tables, and 12) Supplemental Materials. Page numbering should begin with the Title Page.

Concise and comprehensive articles devoted to review a topic from basic mechanisms to clinical manifestations and interventional approaches to global health implications comprise this category. Most review articles are invited by the Editors; however, unsolicited material might also be considered for publication. If you wish to submit a review article to the journal, please do so via https://e-kcj.org our submission site.

Perspectives for outbreaking issues are brief and timely articles for the newly emerging or debating issues in cardiovascular medicine. Both invited and unsolicited articles can be published after peer-review by experts and editor on related fields.

Editorials are commentaries on articles that appear in the journal and are invited by the editors. Editorial topics could include active areas of research, fresh insights, and debates in all fields of cardiovascular medicine. If you are invited to write an editorial, specific requirements will be sent to you. Please do not submit unsolicited editorials.

Clinical images illustrate either important or novel findings and provide insight into diagnosis and mechanisms responsible for cardiovascular medicine. The maximum number of authors for images in cardiovascular medicine is 8.

Letters to the Editor focus on a specific article published in KCJ within 6 months of the issue date. We will seek a reply to your letter from the authors of the original paper and publish both together.

The decision will be made by the reviewers who reviewed the original articles.

Research Letter is the original investigations of a focused nature.