Consider the following medical report that includes the patient's historical health records. Use it to predict the disease that the patient is high likely exposed to. 

 Medical Report: history of present illness: this 74 year old, white male, has a history of hypertension, hypercholesterolemia and aortic stenosis and has been experiencing dyspnea and occasional chest discomfort with walking. he underwent a stress echo on which revealed an ejection fraction of 55 to 60%; mild mitral regurgitation; trace tricuspid regurgitation; mild aortic stenosis with an aortic valve area of 1.9 cm squared and 2+ aortic insufficiency. his post exercise echo showed this report was cut off! , m.d. dictated by: medquist36 procedure: single internal mammary-coronary artery bypass extracorporeal circulation auxiliary to open heart surgery (aorto)coronary bypass of two coronary arteries open and other replacement of aortic valve with tissue graft diagnoses: coronary atherosclerosis of native coronary artery pure hypercholesterolemia unspecified essential hypertension aortic valve disorders 

Answer: The patient is high likely exposed to