title: Diagnostic radiology and nuclear cardiology. Their use in assessment of equine cardiovascular disease.
abstract: Survey thoracic radiography, although limited by physical considerations in the adult horse, can supply clinically useful information about changes in cardiac size and function. The radiographic features of cardiomegaly, altered pulmonary circulation, pulmonary edema, and pleural effusion as manifested in the horse are discussed. Nuclear cardiology can be performed in the standing horse. The initial transit of a radioactive tracer through the central circulation provides information about cardiac chamber size, efficiency of ventricular contraction, valvular competence, and presence of intracardiac or extracardiac shunts. Computer analysis of similar studies allows quantitation of several useful cardiac parameters including ventricular ejection fraction and shunt size (QP/QS). Gated blood pool nuclear studies are better suited to evaluate cardiac response to stress but are difficult to perform in the conscious horse with standard imaging equipment.
authors.forename: P D
authors.initials: PD
authors.lastname: Koblik
authors.forename: W J
authors.initials: WJ
authors.lastname: Hornof
mesh_terms: D000790:Angiocardiography / Q000662:veterinary; D000818:Animals; D006328:Cardiac Catheterization / Q000662:veterinary; D002306:Cardiac Volume; D006332:Cardiomegaly / Q000000981:diagnostic imaging / Q000662:veterinary; D002318:Cardiovascular Diseases / Q000000981:diagnostic imaging / Q000662:veterinary*; D006321:Heart / Q000000981:diagnostic imaging; D006734:Horse Diseases / Q000000981:diagnostic imaging*; D006736:Horses; D008168:Lung / Q000000981:diagnostic imaging; D008171:Lung Diseases / Q000000981:diagnostic imaging / Q000662:veterinary; D008297:Male; D008944:Mitral Valve Insufficiency / Q000175:diagnosis / Q000662:veterinary; D011652:Pulmonary Circulation; D011654:Pulmonary Edema / Q000662:veterinary; D013902:Radiography, Thoracic / Q000662:veterinary; D011877:Radionuclide Imaging