Why the study?
Little information is published about atrial septal defects in horses, and their clinical significance in this species remains poorly understood.
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Real-time 3D echocardiography is a useful modality for fully characterizing atrial septal defects in horses.
Atrial septal defects have been well reported in humans and dogs and the principles of intervention have been well established. In contrast, there is very little information published about these congenital anomalies in horses. True ASDs are regarded as rare and little is known about the clinical significance of these defects in horses. An 11-year-old Thoroughbred gelding with a history of poor performance was diagnosed with an atrial septal defect, measuring approximately 2 cm in diameter, on 2D transthoracic echocardiography. Real-time three-dimensional (3D) echocardiography was used to map the structure of the defect and was useful in fully characterising the ASD in this case.
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Redpath et al. (2020) studied this question.
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