Untreated hyperthyroidism (Graves disease) can cause heart damage due to the fast heart rate leading to heart failure. Aortic stenosis is a narrowing of the valve opening and the gateway of blood pumped from the left ventricle into circulation. When narrow the left ventricle has increased pressure and there is chamber remodeling. The remodeling can effect the valve opening as a result the left ventricle dilates.
I had a dilated left ventricle 7 years ago and congested heart failure. The dilated left ventricle deformed the mitral valve opening (orifice) and caused moderate to severe mitral valve regurgitation (backflow) less blood is pumped into circulation with each heartbeat consequently heart failure. Medication reduced the LV to normal but the valve damaged remains (there was a slight expectation for normal valve)..
If the aorta valve stenosis is related to Graves Disease, it would be due to the physiological change of the left ventricle that reduced the valve opening (deformed), and the fast heart rate would be the underlying cause the morphology of the valve. The underlying cause for my dilated left ventricle dilation and heart failure was ischemic (high blood pressure and vessel occlusions) that overworked and stressed the heart.
Ken
I just came across your post in 2009 regarding Graves' Disease and Aortic Stenosis. I am exactly at the point your fiance was at that time. Starting treatment for Graves' and they've just found the stenosis. Can you give me an update on how he is doing now? I have shortness of breath & palpitations..and scheduled to the cardiologist regarding treatment. Just started thyroid med and taking metoprolol for the heart. I appreciate your time and hope he is well!