Under the leadership of Editor-in-Chief, Joseph Loscalzo, Circulation publishes the most important papers from across the world of cardiology every week.Online subscriptions are available to members of the American Heart Association/American Stroke Association as a benefit of membership depending on membership level. Members may also qualify for special rates on print subscriptions. Visit My.AmericanHeart.org for more information on membership benefits and to join/renew today!Ranked 1st in impact factor and total cites within the Cardiac & Cardiovascular Systems, Peripheral Vascular Disease, and Hematology Subject Matter Categories (2008 Journal Citation Reports174;, Thomson Reuters, 2009). Recognized as One of the 100 Most Influential Journals of the last 100 Years in Medicine and Biology by the SLA Biomedical & Life Sciences Division.CME Available.