The Sir James Mackenzie Cardiological Society and the American College of Cardiology.

Documents have recently been discovered that detail the origin and emergence of the New York Cardiological Society in 1928 from an earlier local organization that was founded in 1926 and named in honor of the Scottish cardiologist Sir James Mackenzie. These documents shed light on the earliest evolution of antecedent societies to the present American College of Cardiology and provide important insight into the early professional organization of clinical cardiology in the United States.