Canine Heart Anatomy: Atrial Septal Defect (ASD)3D Model
Atrial septal defect (ASD) is a congenital heart anomaly that enables blood flow between the left and right atria via the interatrial septum (the separating wall). Typically, the blood will shunt into the right atrium, causing a volume overload to the right atrium, right ventricle, and pulmonary vasculature, which can sometimes lead to pulmonary hypertension. However, if right-sided pressures are too high, shunting may occur right to left, causing generalized cyanosis.
ASD is more common in cats (9 percent of congenital heart defects) than dogs (0.7 percent), though a recent study from France suggests a higher incidence, with ASD accounting for 37.7 percent of congenital cardiac defects in pooled data from dogs and cats.
https://www.petmd.com/dog/conditions/cardiovascular/c_dg_atrial_septal_defect
3D model segmented from CT Angiogram data set provided by TAMU Small Animal Hospital
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