Dr. Alan Johnston is a cardiothoracic surgeon practicing in Orlando, FL. Dr. Johnston specializes in surgical procedues of vital organs in the chest such as the heart, lungs, esophagus and more. As a cardiothoracic surgeon, Dr. Johnston typically treats conditions like heart disease and lung disease. This class of surgeon can also include cardiac surgeons, cardiovascular surgeons, congenital heart surgeons and general thoracic surgeons.