“Healing is a matter of time, but it is often a matter of opportunity.”—Hippocrates In the past decade, new angiographic technics have assumed an important and prominent place in the field of diagnostic roentgenology. These methods of examination are the responsibility of the radiologist. They challenge his willingness and competence to provide highly sophisticated vascular studies with minimum hazard to the patient. In addition, they also offer an unparalleled opportunity of increasing the stature of the radiologist as a clinician. The need for angiographic examinations in acute clinical emergencies has placed a new demand on Radiology Departments. It is now necessary to have a trained angiographic team constantly available and capable of providing emergency services. Advanced and more aggressive surgical technics, improved anesthesia, and other means of supportive therapy have made the availability of diagnostic arteriographic procedures imperative. Modern surgeons are being trained in the fields of car...