Instructions to Authors

JOURNAL OF CARDIAC RESEARCH publishes Clinical Investigations related to diseases of the heart and circulation. Experimental studies of related clinical problems, manuscripts on advances in methodology and technology in the field, Short Communications and Letters to the Editor related to these articles are also considered for publication. In addition, there are Editorials; Reviews; contributions to the departments Electrophysiology, Pacing, and Arrhythmia; Clinical Pathologic Correlations; Computers in Clinical Cardiology; Progress in Clinical Trials; Images in Cardiology; Preventive Cardiology; and Profiles in Cardiology.
All articles become the property of the publisher, who reserves the copyright and rights of renewal and translation into other languages on all published material. JOURNAL OF CARDIAC RESEARCH accepts no responsibility or liability for statements, opinions, and data presented in these articles, or any advertised product or service.
Any potential conflict of interest must be noted as indicated on the copyright release. We regret that rejected manuscripts cannot be returned.
JOURNAL OF CARDIAC RESEARCH is published 4 times a year. Manuscripts should be sent to the JCR website.
Manuscripts should be prepared in accordance with The Uniform Requirements for Manuscripts Submitted to Biomedical Journals - International Committee of Medical Journal Editors, available at http://www.icmje.org
A manuscript will be considered only with the understanding that it is an original contribution that has not been published elsewhere. Before the peer-review process, all submissions are first reviewed by the editor. At the final stage of publication, a comprehensive copyediting is undertaken for accuracy and clarity, after which galley proofs are sent to the authors for approval.
Authors are responsible for the content of the submitted material. All authors should sign a written consent indicating that they have seen and approved the final version of the manuscript. At the time galley proofs are sent, the authors are required to fill in a form covering authorship contributions, whether any conflict of interest issue exists, and transfer of copyright to the Journal.
The authors should acknowledge and provide information on grants, contracts or other financial support of the study provided by any foundations and institutions or firms.
General Instructions
Submit manuscripts in triplicate, type written in English and double-spaced throughout. Number pages consecutively and arrange as follows: title page, abstract and key words, text, acknowledgement(s), references, tables, figure legends, and figures.
The title page should contain the title of the paper; the name(s) and academic degrees of the author(s); the department(s) and institution(s) at which the work was done; the full name and address, including the direct telephone, fax, and/or e-mail, of the author to whom all correspondence and reprint requests should be mailed; and acknowledgement of support grants.
The abstract is approximately 250 words. For clinical investigations, structure as follows: background, methods, results, conclusions. A list of up to seven key words to be used for indexing purposes should conclude the abstract.
The text begins with an Introductionbriefly stating what was studied and why.
Methods describes, in sufficient detail to allow replication of the work, the methodology and technology or preparations used. In a clinical trial, patient population should be defined. New or modified methods should be critically evaluated. For well-known methods, references may be supplied. Chemical agents, drugs, anesthetics, and methods of application should be identified (trademarked products require manufacturer name, city, and country), and route, concentration, frequency, and time of additional doses should be described. It should be stated that investigations were in accordance with the Declaration of Helsinki.
Results should appear in a logical order, with tables and figures.
The Discussion should interpret results relative to previously published work in the field. Hypotheses and speculations should be clearly labeled.
Conclusions: Authors are encouraged to draw conclusions from their findings and, if appropriate, indicate areas of future investigation.
Tables should be numbered with roman numerals, e.g., Table I.
Figures: Acceptable electronic formats are .Jpeg, .tif and .bmp.
Figure legends should be typed, double-spaced, on a separate sheet of paper. All symbols and abbreviations must be identified. For previously published figures, written permission from the copyright holder and the author of the work must be submitted and proper citation given in the legend.
Values should be given in mean ± standard deviation (± SD).
Citations of reference material in the text should be given by number.
References are placed at the end of the text and must be arranged in a numbered list in order of citation. All authors' names (rather than et al. ) must be included. Journal titles should be abbreviated according to the Index Medicus and inclusive page numbers must be cited. The style and punctuation should follow the formats outlined below:
Book: Jenni R, Hübscher W, Casty M, Anliker M, Krayenbühl HP: Quantitation of aortic regurgitation by a percutaneous 128-channel digital ultrasound Doppler instrument. In Echocardiography, p. 241 (Ed. Lancée CT). The Hague: Martinus Nijhoff Publishers, 1979
Journal: Kim YI, Noble RJ, Zipes DP: Dissociation of the inotropic effect of digitalis from its effect on atrioventricular conduction. Am J Cardiol 1975;36:459–464
Abbreviations and acronyms should be used only in instances of long, frequently used words or phrases and must be defined at first use. For acceptable abbreviations and usage, see the Council of Biology Editors Style Manual, 6th Edition, 1994 (Cambridge University Press, 110 Midland Avenue, Port Chester, NY 10573, USA; 1-800-872-7423).
Units , quantities, and formulas should be expressed according to the recommendations of the International System of Units (SI).
For Images in Cardiology include title; a maximum of two glossy prints, preferably a clinical image and a pathology specimen; figure legends; brief (<100 words) text, if needed; and a single best reference.