<prompt> Answer this question truthfullyWhat is the importance of an electrocardiogram in diagnosing bicuspid aortic stenosis?  <response>: <reason> Class I 1. An ECG is recommended yearly in the asymptomatic adolescent or young adult with AS who has a Doppler mean gradient 30 mm Hg or a peak velocity 3.5 m per second peak gradient 50 mm Hg and every 2 years if the echocardiographic Doppler mean gradient is 30 mm Hg or the peak velocity is 3.5 m per second peak gradient less than or equal to 50 mm Hg. Level of Evidence: C Class IIa 1. Graded exercise testing is a reasonable diagnostic evaluation in the adolescent or young adult with AS who has a Doppler mean gradient 30 mm Hg or a peak velocity 3.5 m per second peak gradient 50 mm Hg if the patient is interested in athletic participation, or if the clinical findings and Doppler findings are disparate. Level of Evidence: C 