We Take Your Health to Heart

Our Surgeons 

Robert D. Riley, M.D.
Medical Director and Chairman of Cardiovascular Surgery
A cardiothoracic and vascular surgeon, Dr. Riley received his medical degree from the Medical College of Virginia in Richmond. He completed both his residency in general surgery and a research fellowship in cardiothoracic surgery at Wake Forest University Medical Center in Winston-Salem, North Carolina. He was chief resident in general surgery and a resident in cardiothoracic surgery at that same facility. 

He was an attending physician for four years at North Carolina Baptist Hospital and assistant professor of surgery at Wake Forest University in Winston-Salem. He came to Arizona in 2004 to enter private practice. 

Dr. Riley is board certified by the American Board of Thoracic Surgery, the American Board of Surgery and the National Board of Medical Examiners.

He practices with Arizona Cardiovascular and Thoracic Surgeons of Scottsdale.


Kenneth A. Ashton, M.D.
A thoracic and cardiovascular surgeon at Southwest Heart & Lung in Phoenix. Dr. Ashton has interests in off-pump (beating heart) coronary artery bypass grafting, mitral valve repair, aortic valve replacement, mini (MAZE) procedure (for stand alone atrial fibrillation) and minimally invasive valve surgery. He also has interests in thorascopic procedures, lung cancer and esophageal cancer. 

He received his bachelor’s degree from the University of Arizona, his medical degree from St. Louis University, and completed his general surgery internship and residency at the University of Southern California, where he also had advanced training in thoracic and cardiovascular surgery. 

Dr. Ashton is board certified in both general surgery and thoracic and cardiac surgery. He has staff privileges at all three Scottsdale Healthcare hospitals and also at 13 additional hospitals in the Valley and Flagstaff.


Rajeev S. Kathuria, M.D., F.A.C.S.
Dr. Kathuria is President and Managing Partner of Arizona Cardiovascular and Thoracic Surgeons. Previously, he was a cardiovascular surgeon for Arizona Heart Institute in Phoenix for 11 years and served as Medical Director for cardiovascular surgery at the facility in 2003-2004. He currently performs cardiovascular surgery at Scottsdale Healthcare. 

Dr. Kathuria graduated with distinction (top 3% of graduating class) from the George Washington School of Medicine and Health Sciences in 1985. He was a member of the Alpha Omega Alpha Medical Honor Society and received the C.V. Mosby Award for Scholastic Excellence. He served his surgery residency at the George Washington University Medical Center in Washington, D.C., from 1985 to 1991, as well as his residency in cardiothoracic surgery from 1991 to 1993. During those tenures, he received the Department of Emergency Medicine Award for Clinical Excellence in1986, the Upjohn Award for Outstanding Residency Achievement in 1991and the Attending Physicians' Association Award as Surgical Resident of the Year in1991. 

The doctor’s certifications include Diplomat of the American Board of Thoracic Surgery, the American Board of Surgery and the National Board of Medical Examiners. He also has Advanced Trauma Life Support certification from the American College of Surgeons. 

He has appointments at nine different Valley hospitals, including all three Scottsdale Healthcare hospitals.


Michael P. Caskey, M.D.
Dr. Caskey is founder of Arizona Heart & Lung PC. He practices at Southwest Heart and Lung in Phoenix.

He earned his medical degree at the University of Texas Medical Branch in Galveston where he was a member of Mu Delta Honorary Society. He completed his internship and residency with the Phoenix Integrated Surgical Residency Program at Good Samaritan Hospital, the V.A. Medical Center and Phoenix Indian Hospital in Phoenix. He was a fellow in cardiovascular and thoracic surgery at Rush Presbyterian-St. Luke’s Medical Center in Chicago. 

Dr. Caskey formerly was Chairman of Cardiovascular & Thoracic Surgery at St. Joseph’s Hospital and Medical Center, Medical Director for Cardiovascular Services at John C. Lincoln Hospital and Medical Director for Cardiovascular Services for St. Luke’s Hospital, all in Phoenix. 

The doctor is associated with the Training Center for Off Pump Surgery, Minimally Invasive Valve Surgery, and Valve Repair.