Related Experiment Video
Updated: Jun 27, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
Atrioventricular Canal Defect (incomplete form of endocardial cushion defect) and Ostium Secundum Type Interatrial
C N Amberger1, C E Boujon, Chris Amberger
1Small Animal Practice 96, rue de la Servette CH-1202 Geneva-Switzerland.
Abstract:
A four-year-old German shepherd mixed-breed dog was presented with an asymptomatic heart murmur. An atrial septal defect associated with tricuspid and mitral dysplasia (atrioventricular canal defect) was diagnosed. The pulmonary to systemic blood flow ratio was in the range of 2.5:1 (Qp:Qs ratio). Echocardiography and flow pattern across the valves as well as the direction of the shunt allows a better description of the physiopathological consequences of this rare congenital heart disease. Additionally, an Ostium Secundum Type interatrial septum defect was found at necropsy.
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