An electrocardiogram (ECG) often shows enlargement of the left ventricle. A chest x-ray may show evidence of CHF. An ultrasound of the heart and Doppler flow study allow precise evaluation of the severity of the stenosis. The ECG, chest x-ray, and echocardiogram are repeated at varying intervals to monitor the progression of the stenosis. Similarly, mild dyspnea with exertion often precedes CHF. A heart murmur is audible with a stethoscope. A murmur due to associated leakage of the aortic valve and/or mitral valve disease may also be present.
The prevalence in the Spain of any valve disease is 2.5%. Of those with valve disease about 0.4% have aortic stenosis. The prevalence of moderate or severe aortic stenosis in patients more than 75 years old is 3.0%. It is the most common valvular heart disease of the elderly and increases with age. The prevalence is 4.5% at age 75 years and 8.1% at 85 years