Cardiothoracic surgery is the surgical specialty focused on the heart, great vessels, lungs, chest wall, diaphragm, and esophagus, encompassing both cardiac and general thoracic domains[cite: 3]. The field treats a wide array of conditions, from congenital heart defects to malignant and benign thoracic diseases, and often involves multidisciplinary collaboration with anesthesiologists, perfusionists, intensivists, and other medical specialties[cite: 3]. Modern practice is notable for its high-stakes, technically demanding operations and for its ongoing evolution toward less invasive and more precise approaches[cite: 3].
Within cardiothoracic surgery, two major domains are commonly distinguished: cardiac surgery, which targets the heart and its great vessels, and general thoracic surgery, which addresses the lungs, esophagus, chest wall, and related structures[cite: 3].
Cardiothoracic surgery employs a range of surgical approaches, with a growing emphasis on minimally invasive techniques, including robotic-assisted and endoscopic methods, alongside traditional open procedures[cite: 3]. Robotic systems, such as the da Vinci® Surgical System, are used to perform complex cardiothoracic procedures laparoscopically through small incisions with enhanced precision[cite: 3]. The laparoscopic nature of these operations makes them less invasive, typically resulting in smaller punctures rather than large incisions and a faster healing process[cite: 3].
Cardiopulmonary bypass (CPB) is a cornerstone of many cardiothoracic procedures, providing a non-native circulation and oxygenation when the heart and/or lungs must be temporarily stopped or isolated during surgery[cite: 3]. Conventional on-pump CPB employs a heart-lung machine to take over the circulatory and respiratory functions while the surgeon operates on a still heart[cite: 3]. Alternatively, off-pump or beating-heart strategies aim to perform coronary or other procedures without full CPB support, potentially reducing some CPB-associated risks[cite: 3].
Dr. Dimitrios Koudoumas, MD PhD, is a board-certified cardiovascular, cardiothoracic and vascular surgeon serving Great Falls, MT[cite: 4]. Dr. Koudoumas practices at the Benefis Health System Heart & Vascular Institute, where he provides cardiac, vascular and endovascular surgery[cite: 4]. His practice brings deep subspecialty training to every case, focusing heavily on coronary artery bypass surgery, thoracic and abdominal aortic aneurysm repair, aortic dissection, and aortic valve disease[cite: 4].
Dr. Koudoumas earned his MD from the National and Kapodistrian University of Athens in Greece, followed by a PhD for cardiovascular research[cite: 4]. He completed a cardiac ICU fellowship at Brigham and Women's Hospital and Harvard Medical School, general surgery training at SUNY Stony Brook, and a Cardiothoracic Surgery Fellowship (Cardiac Track) at the University of Utah[cite: 4]. This MD/PhD pathway, combined with board certification in thoracic surgery, keeps him at the leading edge of cardiac and vascular care[cite: 4].