Dr. Mussa is an international leader in the treatment of aortic dissection. Since 2023, he has led the National Heart, Lung and Blood Institute (NHLBI) awarded study, the IMPROVE-AD trial to address the most appropriate treatment of patients with uncomplicated Type B aortic dissection (uTBAD). His areas of clinical expertise include open and complex endovascular repair of thoracic and abdominal aortic aneurysms, type B aortic dissections, carotid artery stenosis, lower extremity ischemia, mesenteric ischemia, and venous insufficiency and varicose veins. Dr. Mussa holds joint appointment with the Imperial College in London. Has been actively involved teaching, mentoring and training medical students, residents and fellows.