Merck Manual

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Ventricular septal defect, dog
Ventricular septal defect, dog

    Left: A small ventricular septal defect is present in the paramembranous portion of the interventricular septum (*), allowing blood to shunt from the left ventricular outflow tract to the right ventricle just below the tricuspid valve. Right: Color-flow Doppler shows turbulence associated with the left-to-right shunt. Right long-axis view, RV = right ventricle, LV = left ventricle.

Courtesy of Dr. Sandra Tou.