Dr. Olle Kjellgren received his medical degree from Karolinska Institute in Stockholm, Sweden in 1987. He completed his internship and residency in internal medicine at Columbia University and St. Luke's Roosevelt Hospital Center in New York, New York. He completed his fellowship in cardiovascular medicine at The Mount Sinai Medical School and The Beth Israel Medical Center, also in New York, New York. He completed an additional fellowship in interventional cardiology at The University of Texas Medical School and Hermann Hospital in Houston, Texas. Dr. Olle Kjellgren is board certified by the American Board of Internal Medicine in cardiovascular medicine, interventional cardiology and internal medicine. He is also board certified in echocardiography by the National Board of Echocardiography. Dr. Olle Kjellgren has been practicing clinical and interventional cardiovascular medicine at Ochsner Baptist in New Orleans since 1995.