Patient presents with symptoms suggestive of nonrheumatic aortic valve stenosis.  Presenting complaints include exertional dyspnea, angina pectoris, and syncope, consistent with reduced cardiac output.  Physical examination revealed a systolic ejection murmur, heard best at the right second intercostal space radiating to the carotid arteries.  The murmur is characterized as crescendo-decrescendo.  Electrocardiogram findings indicate left ventricular hypertrophy.  Echocardiography confirms the diagnosis of aortic stenosis, demonstrating reduced aortic valve area and elevated transvalvular pressure gradient.  The aortic valve leaflets appear thickened and calcified, indicative of degenerative calcific aortic stenosis.  No evidence of rheumatic heart disease is noted.  The patient's medical history is significant for hypertension and hyperlipidemia.  Current medications include lisinopril and atorvastatin.  Assessment: Nonrheumatic aortic valve stenosis, likely severe.  Plan:  Cardiac catheterization is recommended to further assess the severity of stenosis and determine left ventricular function.  Surgical aortic valve replacement or transcatheter aortic valve replacement will be considered based on catheterization findings and the patient's overall clinical status.  Patient education provided regarding the disease process, treatment options, and the importance of follow-up care.  Patient instructed to report any worsening symptoms, including chest pain, shortness of breath, or syncope.  ICD-10 code: I35.0.