Pennsylvania Cardiothoracic Surgery expert witnesses are board-certified surgeons from leading centers like UPMC, Penn Medicine, and Geisinger who manage complex cardiac and thoracic disease in diverse urban and rural populations. They often specialize in coronary bypass, valve repair, aortic surgery, heart failure, ECMO, and lung resection. They commonly evaluate surgical indications, technique, perioperative management, device use, and postoperative outcomes.