A cardiothoracic surgeon is a doctor who operates on the organs inside your chest, including the heart, lungs, esophagus, and the major blood vessels connected to them. These surgeons handle some of the most complex procedures in medicine, from coronary artery bypass grafting to lung cancer removal, and their training is among the longest of any medical specialty.
What a Cardiothoracic Surgeon Treats
The chest cavity is divided into two main compartments: the pleural spaces (which hold the lungs) and the mediastinum, the central zone between the lungs that contains the heart, esophagus, trachea, and major arteries and veins. A cardiothoracic surgeon works across all of these structures. Specifically, their scope includes the heart and the protective sac around it, the coronary arteries, the lungs and the linings that surround them, the esophagus, the trachea (windpipe), the chest wall, the diaphragm, and the thoracic aorta, which is the large artery that carries blood from the heart down through the chest.
You won’t typically seek out a cardiothoracic surgeon on your own. Most patients arrive through a referral. A cardiologist might send you after diagnosing blocked coronary arteries, a failing heart valve, or heart failure that isn’t responding to medication. A pulmonologist might refer you for a lung mass or collapsed lung. An oncologist might refer you when a tumor in the chest needs surgical removal. The surgeon steps in when the condition requires a physical intervention that medications or less invasive treatments can’t resolve.
Common Procedures
The operations cardiothoracic surgeons perform fall broadly into cardiac (heart) and thoracic (lung and chest) categories, though many surgeons do both.
On the cardiac side, the most well-known procedures include coronary artery bypass grafting, where the surgeon reroutes blood flow around blocked arteries using vessels taken from elsewhere in the body. Valve repair and replacement is another major category, addressing heart valves that don’t open or close properly. Surgery on the thoracic aorta covers emergencies like aortic dissection (a tear in the artery wall) as well as planned repairs of aneurysms, where a weakened section of the aorta bulges dangerously. Some cardiothoracic surgeons also implant mechanical pumps that assist a failing heart or perform heart transplants.
On the thoracic side, surgeons remove cancerous or diseased portions of the lung, repair the esophagus, and treat conditions affecting the chest wall or the space between the lungs. These procedures range from removing a small lung nodule to taking out an entire lung.
Minimally Invasive and Robotic Surgery
Traditional heart surgery requires a sternotomy, where the breastbone is split open to access the chest. Robotic and minimally invasive techniques now allow some operations through small port incisions instead, avoiding that large opening entirely. In cardiac surgery, robotic systems have been used most commonly for mitral valve repair and coronary artery bypass.
The first robotic mitral valve repair was performed in 1998, and the technology received FDA approval for valve surgery in 2002. A comparison of robotic mitral valve repair against traditional open approaches found no significant differences in mortality, lung complications, neurological events, or kidney failure. The robotic group actually had lower rates of irregular heart rhythm and fluid buildup around the lungs, which translated to shorter hospital stays. For robotic coronary bypass, a study of 326 patients showed a mortality rate of 0.6% and 81% freedom from major cardiac events over five years. The practical benefits for patients include less pain, less bleeding, fewer blood transfusions, and a quicker return to normal life.
Not every patient qualifies for a robotic approach. The decision depends on the specific anatomy, the complexity of the problem, and the surgeon’s experience with the technology.
Training and Certification
Becoming a cardiothoracic surgeon takes longer than almost any other medical career path. After four years of medical school, there are three training routes recognized by the Thoracic Surgery Directors Association:
- Traditional pathway: Five years of general surgery residency, then two to three years of cardiothoracic surgery residency (total: seven to eight years after medical school).
- Integrated pathway (I-6): Six years of cardiothoracic surgery residency entered directly from medical school, combining general and cardiothoracic training into one program.
- Fast-track pathway: Four years of general surgery plus three years of cardiothoracic surgery, all at a single institution (total: seven years).
After residency, surgeons can pursue additional fellowship training in subspecialties like heart transplantation and mechanical support, congenital heart surgery (operating on hearts with birth defects, often in children), thoracic aortic surgery, or general thoracic surgery focused on the lungs and esophagus.
Board certification comes through the American Board of Thoracic Surgery. To stay certified, surgeons must pass an exam every five years, earn an average of 30 continuing medical education credits per year, complete a patient safety course, and participate in a practice quality improvement project. The board can also audit surgeons at any time and request reference letters from colleagues, staff, and patients.
Cardiac vs. Thoracic vs. Cardiothoracic
These terms overlap in ways that can be confusing. “Cardiothoracic surgeon” is the broadest label, covering anyone trained to operate inside the chest. In practice, many surgeons specialize further. Some focus exclusively on the heart and call themselves cardiac surgeons. Others concentrate on the lungs, esophagus, and airway, practicing as general thoracic surgeons. Congenital heart surgeons work specifically on structural heart defects present from birth, often operating on infants and children. All of these specialists complete the same foundational cardiothoracic training before narrowing their focus.
Recovery After Major Chest Surgery
Recovery timelines vary by procedure, but open heart surgery offers a useful benchmark since it’s the most common major operation in this field. According to the American Heart Association, most people start feeling better four to six weeks after open heart surgery. During that window, you’ll need to avoid driving, biking, or riding a motorcycle for six weeks. Lifting heavy objects and reaching above your shoulders are off limits for six weeks as well, to protect the healing breastbone. Sexual activity can resume two to four weeks after leaving the hospital for most patients.
Returning to work depends on what you do. Light work is realistic for most people in six to 12 weeks. Physically demanding jobs take longer. Minimally invasive and robotic procedures generally shorten these timelines because there’s no breastbone incision to heal.
Workforce and Compensation
The field is facing a significant workforce challenge. Multiple analyses project a shortage of nearly 2,000 cardiothoracic surgeons by 2030, driven by an aging population that needs more heart and lung surgery combined with unpredictable trends in how many trainees enter the specialty.
Compensation reflects the intensity of the training and the complexity of the work. A survey of early-career cardiothoracic surgeons found an average starting salary of roughly $375,000 before taxes. Surgeons who took academic positions at teaching hospitals started lower, with a median of $325,000, while those in private or non-academic settings started at a median of $437,500. Notably, the survey found identical median starting salaries for male and female surgeons at $350,000. Surgeons who negotiated their initial offer reported a median salary $50,000 higher than those who didn’t.