Circulation is a scientific journal published by the American Heart Association. From 1996 to 2004, its impact factor has remained close to 10.
2008 saw the appearance of two subspecialty journals out of a planned six journals. The first edition of Circulation: Arrhythmia and Electrophysiology (Circ Arrhythm Electrophysiol) appeared in April 2008,[1] followed by an edition dedicated to heart failure in May titled Circulation: Heart Failure (Circ Heart Fail).[2]
Open access policy
All Circulation papers are available for free full-text open access download after a 12 months grace period after publication. Immediate access to full-text papers less than a year old does, however, require a paid subscription.
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