1. An image guided navigation system for guiding an instrument through a region of a patient, said image guided navigation system comprising: an anatomical gating device operable to sense a physiological event; an imaging device operable to capture image data of the region of the patient in response to said physiological event; a tracking device operable to track the position of the instrument in the region of the patient; a controller in communication with said anatomical gating device, said imaging device and said tracking device and operable to register said image data with the region of the patient in response to said physiological event, said controller further operable to superimpose an icon representing the instrument onto the image data of the region of the patient, based upon the position tracked by said tracking device; and a display operable to display the image data of the region of the patient with the superimposed icon of the instrument.