Bicuspid aortic valve. Ct two months ago to look for aneurysm. Now having sharp back pain right below my heart. Can an aneurysm develop that quickly?

Generally not. If your ct scan was negative, you have very little to be worried about. A sudden change in an aorta can occur with a spontaneous disection, but your symptoms are not typical for that.
A dissecting one... A abrupt bleeding into the wall of an artery is called a dissecting aneurysm and can develop sudden/rapidly. This usually cause severe pain. Otherwise, aortic aneurysm--dilatation of an area of the vessel as in picture here, often takes several years, usually in older folks having atherosclerosis/hypertension. At 25, it is highly unusual. Consult doc for other cause of pain. Good luck.

Related Questions

I need to lose weight to keep my heart healthy (have bicuspid aortic valve). Are the slim-fast or Atkins dietshakes unhealthy & do they actually work?

Say NO to Atkins. Atkins diet will make the lipid profile look better but the nature of your bad cholesterol much worse, so i would not go near it. The better choice than both of those you mentioned is, the dean ornish diet. Read more...
Short time. Any and all commercial diet is good to jump start the weight loss plan but no more than 6 months -- i suggest that you begin healthy lifestyle of healthy diet and exercise this is cheaper and long lasting. Read more...
Healthtap Doctors. are asked not to endorse specific brands or product lines.Eat healthfully. Try to eat at least 5 servings of vegetables & 4 of fruit per day. Increase nutritional fiber. Avoid refined sugar & junk carbohydrates. Avoid alcohol, sweetened juices, soda & caffeinated beverages. Aim for 7.5 to 8 hrs of sleep / night. Hydrate w at least 64 oz of water / day. Calories burned must > calories consumed. Read more...

I am 74 old, 73 in. Tall, 4.8cm ascending aortic aneurysm, with bicuspid aortic valve, when should it be repaired?

Need careful. Evaluation and follow up care by your surgeon , 74 is not considered very old , but your functional status , associated systemic diseases will play in decision for surgery , most likely your you are asymptomatic and aneurysm is stable , you are under observation , follow your doctors advise . Read more...
Variable recs. Recommendations continue to evolve. If your aorta grows more than 0.5 cm/yr->operate. If your aorta is over 5.5 cm->operate. If you have other risk factors, maybe operate at 5.0 cm. Control your blood pressure, use beta-blockers. A very important corollary to these recommendations is to choose your surgeon carefully. Some surgeons have much better outcomes than others. Read more...
Valve is problem. Aneurysm is small and secondary to turbulant blood flow across the abnormal valve. Bicuspid valves generally begin to calcify in the 5th and 6th decades of life leading to Aortic Valve stenosis. You should have a cardiologist and get annual echocardiograms and when the gradient across the valve is > 40mmHG and you have symptoms the valve should be replaced. Tx of aneurysm unnecessary at that size. Read more...
Expansion. Agree with Dr. Sheppard and would add that you need evaluation to know the rate that the aneurysm is growing as that may also influence timing of intervention. Read more...