Final answer:
The secondary echocardiographic finding not associated with severe valvular aortic stenosis is right ventricular hypertrophy; typical findings include decreased left ventricular systolic function, left ventricular hypertrophy, and post-stenotic dilatation of the ascending aorta.
Step-by-step explanation:
Secondary echocardiographic findings associated with severe valvular aortic stenosis include decreased left ventricular systolic function (late in the course of the disease), left ventricular hypertrophy, and post-stenotic dilatation of the ascending aorta. However, right ventricular hypertrophy is not typically a finding associated with aortic stenosis. Right ventricular hypertrophy is more commonly associated with pulmonary hypertension or conditions affecting the right heart directly. Aortic stenosis can lead to various complications such as left ventricular hypertrophy due to the increased work required to pump blood through the stenotic valve. Over time, the increased left ventricular workload can lead to myocardial fibrosis and decreased systolic function. Post-stenotic dilation of the ascending aorta occurs due to the turbulent flow past the stenotic aortic valve.