Korean Circulation Journal, established in 1971, is a professional, peer-reviewed journal covering all aspects of cardiovascular medicine, including original researches of preclinical and clinical findings, state of the art reviews, perspectives for outbreaking issues, editorials, images in cardiovascular medicine, and letters to the editor. Korean Circulation Journal is published monthly in English and publishes scientific and state-of-the-art clinical articles aimed at improving human health in general and contributing to the treatment and prevention of cardiovascular diseases in particular.