text: According to the 2014 AHA/ACC Guideline for the Management of Patients With Valvular Heart Disease, aortic<unk>  is classified into 4 stages based on the valve's anatomy, hemodynamics, and the patients symptoms.
option_0: Aortic insufficiency stages
option_1: Aortic stenosis stages
option_2: Mitral stenosis stages
option_3: Mitral regurgitation stages
option_4: Tricuspid regurgitation stages
option_5: Tricuspid stenosis risk factors
option_6: Left ventricular aneurysm risk factors
option_7: Aortic stenosis risk factors