American Heart Association
The American Heart Association grew out of a set of smaller precursor groups. The primary precursor was the Association for the Prevention and Relief of Heart Disease, formed in New York City in 1915, to study whether patients with heart disease could safely return to work. Several similar organizations formed or evolved in Boston, Philadelphia, and Chicago in the 1920s. Recognizing the need for a national organization to share research and promote findings, the American Heart Association was formed in 1924 by six cardiologists representing several of these precursor groups.
American Association for Thoracic Surgery
The "American Association for Thoracic Surgery" (AATS) is an international association of cardiothoracic surgeons. It was founded in 1917 by the earliest pioneers in the field of thoracic surgery. Headquartered in Beverly, Massachusetts, it has over 1,200 members from 35 countries. To be considered for membership, a surgeon must have a proven record of distinction within the field and have made meritorious contributions to the knowledge of cardiothoracic disease and its surgical treatment.