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(Circulation. 2001;104:1450.)
© 2001 American Heart Association, Inc.

Circulation Impact Factor Is Highest Ever

Ruth SoRelle, MPH

Circulation Newswriter

The impact factor of Circulation has reached 10.893, the highest ever in the publication’s history (Figure). According to figures from the Institute for Scientific Information, the factor puts Circulation above such prestigious publications as The Lancet (10.232) and Proceedings of the National Academies of Science (10.789) for the first time in its history.

View larger version (16K): [in this window] [in a new window]   ISI impact factor for Circulation, 1985 through 2000.

For the editors, the Editor-in-Chief, James T. Willerson, MD, said, "Circulation wants to serve a worldwide group of scientists and physicians at war with cardiovascular disease, as well as the patients that they serve. Markers like that of the impact factor are encouraging and helpful to all who contribute to Circulation."

A journal’s impact factor is based on 2 elements: the numerator, which is the number of citations in the current year to any items published in a journal in the previous 2 years, and the denominator, which is the number of substantive articles (source items) published in the same 2 years (CMAJ. 1999;161:979–980).

Dr Willerson said the Journal and the cardiovascular community had benefited from the Journal’s opportunity to be published weekly. The support of the American Heart Association and Lippincott Williams & Wilkins (the publisher) has also been crucial, he said.

Beginning in January, Circulation will publish all articles accepted by the journal online within 7 to 10 days of the time of acceptance. Printed publication will take place within 4 to 5 weeks. Those were among Dr Willerson’s top goals when he took on the editorship of the Journal.

The publication has also begun a patient and physician information page that alternates monthly. It is designed to give members of the public the information they need to be informed patients. The Physicians’ Page describes state-of-the-art treatment for a variety of heart diseases, and Dr Willerson hopes that by October, the pages will alternate every other week.

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