Echocardiographic right parasternal short-axis left atrial and aortic valve view showing all 3 aortic valve cusps, demonstrating the disproportionately large aortic annulus compared to the adjacent left atrium in a male Newfoundland dog. The right cusp also is larger than the other 2. Age 2.5 years. 1, right aortic valve cusp; 2, left aortic valve cusp; 3, septal (noncoronary) aortic valve cusp; LA, left atrium.