Congenital cardiac disease in dogs.
Nonselective angiocardiography is used to delineate certain congenital cardiac defects. It is useful in demonstrating lesions causing a right-to-left shunt, as in tetralogy of Fallot and a reverse right-to-left patent ductus arteriosus, but not for lesions causing a left-to-right shunt, as in ventricular septal defect. Positive-contrast medium, injected IV as a bolus at 0.5 ml/lb, opacifies the heart chambers and great vessels. Using a rapid film-changing device, 3 films are made in 6 seconds. A rapid film changer can be constructed from plywood, wooden slats and plexiglass. Three cassettes are loaded into the device, the first beneath the x-ray beam and overlying plexiglass window and patient. The first film is exposed just after injection of the contrast medium, and the second and third 2 and 4 seconds later, respectively.
D000790:Angiocardiography / Q000295:instrumentation / Q000662:veterinary; D000818:Animals; D004283:Dog Diseases / Q000151:congenital* / Q000000981:diagnostic imaging; D004285:Dogs; D006330:Heart Defects, Congenital / Q000000981:diagnostic imaging / Q000662:veterinary*