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: the patient is a 48-year-old male with known aortic stenosis, peek gradient of 66 with normal ventricular function who developed angina over the past several months and chest pain on exertion. cath at that time showed normal coronary arteries, moderate as, peek gradient of 66, mean of 41, normal ef. past medical history: includes hypercholesterolemia, tonsillectomy. medications: lipitor 10 mg po q d. hospital course: the patient was taken by dr. to the or, underwent aortic valve replacement with pericardial valve on . postoperatively the patient did very well, was extubated and went off all drips on postoperative day #1 in the intensive care unit and patient was transferred to the floor. recovery was uneventful. however, patient did develop a run of 6 pvcs within one minute strip on the day of discharge. the patient was started on amiodarone po loading dose prior to discharge and patient was placed on the of hearts monitor and prior to discharge. for the monitoring patient is to be followed up with dr. . his office number is . dr. will be reviewing the monitoring data and will follow the patient for the ventricular tachycardia and amiodarone loading. dr. office has already been contact and dr. is aware of the patient and situation. the patient is instructed to contact him once he gets home. discharge medications: amiodarone 400 mg po tid times one week, then 400 mg po bid times one week, then 400 mg po q d, lopressor 25 mg po bid, lasix 20 mg po bid times 10 days, kcl, potassium chloride 20 meq po bid times 10 days, aspirin 81 mg po q d, lipitor 10 mg po q d, percocet 1-2 tablets po q 4-6 hours prn, colace 200 mg po q d. follow-up: the patient is to follow-up with dr. in weeks and patient will be followed up in the interim by dr. at for the of hearts monitoring. upon discharge the patient was afebrile, vital signs were stable, chest was clear to auscultation bilaterally, heart was regular rate and rhythm, incision was clean, dry and intact, no drainage, sternum was stable. upon discharge white count was 10.6, hematocrit 25.2 and bun was 24, creatinine .7. all other laboratory values were within normal limits. , m.d. dictated by: medquist36 procedure: extracorporeal circulation auxiliary to open heart surgery diagnostic ultrasound of heart other esophagoscopy open and other replacement of aortic valve with tissue graft diagnoses: pure hypercholesterolemia aortic valve disorders congenital insufficiency of aortic valve 

Answer: The patient is high likely exposed to