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Circulation is a scientific journal published by Lippincott Williams & Wilkins for the American Heart Association .. Lippincott Williams & Wilkins. Lippincott Williams & Wilkins. scientific journal. scientific journal. American Heart Association. American Heart Association. The journal publishes articles related to research in and the practice of cardiovascular diseases , including observational studies , clinical trials , epidemiology , health services and outcomes studies , and advances in applied -LRB- translational -RRB- and basic research .. cardiovascular. cardiovascular. observational studies. observational study. From 1996 to 2004 , its impact factor remained close to 10 .. impact factor. impact factor. As of 2014 , its impact factor was 14.43 and it ranked fourth among journals in the Cardiac and Cardiovascular Systems , Peripheral Vascular Disease categories .. impact factor. impact factor. 2008 saw the appearance of six subspecialty journals .. The first edition of Circulation  : Arrhythmia and Electrophysiology -LRB- Circ Arrhythm Electrophysiol -RRB- appeared in April 2008 , followed by an edition dedicated to heart failure in May titled Circulation  : Heart Failure -LRB- Circ Heart Fail -RRB- .. heart failure. heart failure. The remaining four journals launched once per month from July through October 2008 .. In order of release they were , Circulation  : Cardiovascular Imaging -LRB- Circ Cardiovasc Imaging -RRB- , Circulation  : Cardiovascular Interventions -LRB- Circ Cardiovasc Intervent -RRB- , Circulation  : Cardiovascular Quality and Outcomes -LRB- Circ Cardiovasc Qual Outcomes -RRB- , and Circulation  : Cardiovascular Genetics -LRB- Circ Cardiovasc Genet -RRB- .