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: past medical and surgical history: significant for status post mitral valve replacement in , heart failure, acute rheumatic fever as a child and hypertension. his medications at home are inderal 20 mg q.d., coumadin 3.75 mg q.d., digoxin .125 mg q.d., lasix 20 mg p.o. q.d. had no known drug allergies. physical examination: was significant for a murmur on auscultation of his heart. patient was off coumadin n preparation for his operation. he was take to the operating room on , had aortic valve replacement and #21 carbomedics top hat through a redo sternotomy. the indication was aortic stenosis. postoperatively he was transferred to the intensive care unit where he was extubated without difficulty and he was on pressors for a while. postoperative day two patient was doing extremely well and was transferred to the floor after being weaned off pressors. physical therapy saw him to evaluate him. his events on the floor were heart rate 122 to 130s consistent with chronic atrial fibrillation. anticoagulation was begun as well as a heparin drip until therapeutic and that was discontinued once his inr was over 2.0. on postoperative number four on patient had no acute events, we continued anticoagulation, increased his lopressor to 25 mg p.o. b.i.d. to reduce his heart rate. on his heart rate was still a little elevated. given his nature of chronic atrial fibrillation no amiodarone was started. his mediations on discharge will be coumadin 3.75 mg p.o. or 4 mg p.. titrated to his inr therapeutics for st. jude valve. he will be receiving lopressor at the dose of 25 mg p.o. b.i.d. he will be receiving tums p.r.n. he will be on aspirin 325 mg p.o. b.i.d., percocet p.r.n. for pain. bisacodyl suppositories as needed, regular insulin sliding scale as needed as he is diabetic, lasix 20 mg p.o. b.i.d. for one week and then go back to his 20 mg p.o. q.d. dose. whenever he takes lasix he will require potassium chloride 20 meq p.o. b.i.d. and he will go on a stool softener colace 100 mg p.o. b.i.d. he is being discharged to rehabilitation. he is to follow up with dr. after that. he will receive anticoagulation at discharge and on an outpatient basis after that by his primary care provider and his cardiologist. , m.d. dictated by: medquist36 procedure: diagnostic ultrasound of heart open and other replacement of aortic valve diagnoses: congestive heart failure, unspecified unspecified essential hypertension diabetes mellitus without mention of complication, type ii or unspecified type, not stated as uncontrolled atrial fibrillation heart valve replaced by other means long-term (current) use of anticoagulants diseases of tricuspid valve rheumatic aortic stenosis 

Answer: The patient is high likely exposed to