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(Circulation. 2004;109:e9054-e9055.)
© 2004 American Heart Association, Inc.

Cardiovascular News

Ruth SoRelle, MPH

Circulation Newswriter

An extract of the first 250 words of the full text is provided, because this article has no abstract.

Circulation Impact Factor Reaches New High

Circulation’s impact factor was 11.164 in 2003—the highest it has ever been. The journal has ranked highest in cardiovascular journals since it began weekly publication in 1998 under the direction of Editor James T. Willerson, MD.

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[Free Full Text]).

For comparison purposes, the impact factor for the New England Journal of Medicine was 34.833; for Science, 29.162; Nature, 21.65; the Journal of the American Medical Association, 21.455; Lancet, 18.316; the Annals of Internal Medicine, 12.427; Circulation Research, 10.117; the Journal of the American College of Cardiology, 7.599; Arteriosclerosis, Thrombosis and Vascular Biology, 6.791; the European Heart Journal, 5.997; Stroke, 5.233; and Cardiovascular Research, 5.164.

For Dr Willerson, whose editorship of the journal Circulation ends this month, the latest impact factor demonstrates the credibility of his vision for the journal. Under his leadership, Circulation added sections specifically for the practicing cardiologist, online pages (including Cardiovascular News), Rapid Track Articles, Cardiology Patient Pages, Clinician Update, Rapid Access Articles, and Mini-Review: Expert Opinions. He took the journal online during his tenure and made it possible for authors to submit their research articles . . . [Full Text of this Article]