Final answer:
Possible two-dimensional echocardiographic findings in significant aortic valve stenosis include aortic valve calcification, left ventricular hypertrophy, and post-stenosic dilatation of the ascending aorta.
Step-by-step explanation:
The possible two-dimensional echocardiographic findings in significant aortic valve stenosis include A) Aortic valve calcification, B) Left ventricular hypertrophy, and C) Post-stenosic dilatation of the ascending aorta. Therefore, the correct answer is D) Post-stenotic dilatation of the descending aorta, which is NOT a finding in significant aortic valve stenosis.