The literature contains various data regarding the value of the exercise testing in patients with asymptomatic aortic stenosis (AS). The aim: To determine the importance of exercise testing in cardiovascular risk stratification in patients with moderate severe to severe aortic stenosis. Out of a total 33 patients with moderate severe to severe asymptomatic aortic stenosis (mean aortic area EOA 0.9±0.34 cm^sub 2^) we followed up 31 patients (two were excluded) during the 12 months' period by clinical, transthoracic echocardiogram and treadmill stress testing. 18 (58%) patients discontinued the test due to limiting symptoms, and had severe aortic stenosis (EOA ≤0.8 cm^sub 2^). During the follow-up, 11 patients spontaneously developed severe symptoms within 12 months' period, of whom 8 underwent aortic valve replacement, one patient died (sudden cardiac death), and two patients had a stroke. A total of 20 patients remained free of any symptoms. The highest predictive value is EOA ≤0.8 cm^sub 2^ for the provoked symptom test and it is 85%. ST depression had the highest negative predictive value. Only limiting symptoms with critical aortic of area (EOA ≤0.8 cm^sub 2^) have a positive predictive value.