Dr. Krishnakumar Nair and Dr. Andrew Ha, electrophysiologists at UHN's Peter Munk Cardiac Centre, used a vein in the liver to access the chambers of a patient's heart. Access to the vein in the liver was obtained by the interventional radiology team led by Dr George Oreopoulos. This procedure, a Canadian-first on an adult patient, has been performed by only a handful of specialized centres in the world. (Photo: UHN)