The following are valid American Heart Association and American Stroke Association medical and scientific statements and practice guidelines. These are published in Circulation; Stroke; Arteriosclerosis, Thrombosis, and Vascular Biology; Hypertension; Circulation Research or other journals. Most AHA scientific statements and advisories are published in Circulation. Most AHA/ASA scientific statements and guidelines are published in Stroke. Joint AHA and American College of Cardiology (ACC) statements and guidelines also appear in the Journal of the American College of Cardiology (JACC).