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Merck Manual
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Merck Manual
Veterinary Manual
The trusted provider of veterinary information since 1955
VETERINARY PET
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H
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Veterinary /
Circulatory System /
Congenital and Inherited Anomalies of the Cardiovascular System /
... /
Outflow Tract Obstructions in Animals /

OTHER TOPICS IN THIS CHAPTER

Congenital and Inherited Anomalies of the Cardiovascular System
Congenital and Inherited Anomalies of the Cardiovascular System in Animals
Outflow Tract Obstructions in Animals
Aortic Stenosis in Animals
Pulmonic Stenosis in Animals
Coarctation of the Aorta in Animals
Left-to-Right Shunts in Animals
Patent Ductus Arteriosus in Animals
Ventricular Septal Defects in Animals
Atrial Septal Defects in Animals
Right-to-Left Shunts (Cyanotic Heart Disease) in Animals
Tetralogy of Fallot in Animals
Other Cyanotic Heart Diseases in Animals
Conditions of the Atrioventricular Valves in Animals
Mitral Valve Dysplasia in Animals
Tricuspid Valve Dysplasia in Animals
Mitral Valve Stenosis in Animals
Vascular Ring Anomalies in Animals
Persistent Right Aortic Arch in Animals
Miscellaneous Congenital Cardiac Abnormalities in Animals

Test your knowledge

Circulatory
In all animals, congenital heart defects can cause abnormal shunting of blood. Left-to-right shunts cause blood to be recirculated through the pulmonary vessels and can result in chamber dilatation. Right-to-left shunts cause blood to bypass the pulmonary vessels and can cause cyanosis. Which of the following conditions is most likely to result in a right-to-left heart shunt?

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Outflow Tract Obstructions in Animals

By

Sandra P. Tou

, DVM, DACVIM, North Carolina State University

Last full review/revision Jan 2020 | Content last modified Jan 2020

Outflow tract obstructions are congenital cardiac defects that include aortic stenosis, pulmonic stenosis, and coarctation of the aorta. All involve obstruction to either right or left ventricular outflow. Defects such as double chamber right ventricle, branch pulmonary artery stenosis, and cor triatriatum also create obstruction to normal blood flow but are not located within the right ventricular or left ventricular outflow tracts.

© 2020 Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc., Kenilworth, NJ, USA)
Congenital and Inherited Anomalies of the Cardiovascular System in Animals
Aortic Stenosis in Animals
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Obstructive Uropathy in Small Animals Obstructive Uropathy in Small Animals
Pulmonic Stenosis in Animals Pulmonic Stenosis in Animals

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