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 history: bicuspid aortic valve. medications: zestril 10 mg po q.d. allergies: fava beans. social history: the patient lives with his parents. he denies tobacco use. occasional etoh use. ho course: the patient was admitted and was taken to the operating room with dr. where he underwent an aortic valve replacement with a 25 mm carbomedic valve. the patient originally was scheduled for a bentall procedure, but upon examination by transesophageal echocardiogram in the operating room it was found that there was no dilation of the proximal ascending aorta or sinotubular junction, so it was elected to proceed with a aortic valve replacement. ejection fraction in the operating room was 50%. please see operative note for further details. the patient was transferred to the intensive care unit in stable condition. the patient was weaned and extubated from mechanical ventilation on his first postoperative night. the patient was consistently tachycardic with heart rates in the 1 teens to 120s sinus tachycardia, responded to intravenous lopressor. the patient remained hemodynamically stable with minimal chest tube drainage. on postoperative day number one the patient began ambulating in the hallway. the patient remained in the intensive care unit due to lack of bed availability on the floor. on postoperative day number two the patient was transferred out of the intensive care unit to the regular floor in stable condition. the patient continued to have sinus tachycardia rates into the 1 teens on increasing doses of lopressor. there was a question of whether or not the tachycardia was due to poor pain control. the patient's pain medications were switched to dilaudid and the patient was started on around the clock motrin, which seemed to improve the patient's pain control, but did not change the sinus tachycardia. labetalol was added to the patient's regimen of lopressor, which did improve the tachycardia and heart rate decreased into the 90s to low 100s. on postoperative day number two the patient was started on coumadin for the patient's mechanical aortic valve. the patient began working with physical therapy and the patient's pacing wires were removed on postoperative day number three. the labetalol was increased on postoperative day number three for continued tachycardia. on postoperative day number four the patient completed a level five with physical therapy walking 500 feet and climbing one flight of stairs. the patient remained in the hospital for continued titration of his coumadin therapy. on postoperative day number five the patient's inr rose to 2.0 and on postoperative day number six the patient was cleared for discharge to home. condition on discharge: temperature max 99.1, pulse 99 sinus rhythm, blood pressure 118/70, respiratory rate 16, room air oxygen saturation 95%. the patient's weight on was 104 kilograms. the patient weighed 109 kilograms preoperatively. neurologically the patient is awake, alert and oriented times three, nonfocal. cardiovascular regular rate and rhythm. no murmur or rub, sharp valve click. lungs breath sounds are clear bilaterally. no rales, wheezes or rhonchi. gastrointestinal positive bowel wounds, obese, nontender, nondistended. extremities 2+ pitting edema. sternal incision is clean and dry. sternum is intact. there is no erythema or drainage. laboratory data: white blood cell count 11.3, hematocrit 34.1, platelets count 342, sodium 138, potassium 4.5, chloride 101, bicarb 24, bun 21, creatinine 0.9 and glucose 145. pt 20.8, inr 2.9. discharge medications: 1. lopressor 75 mg po b.i.d. 2. lasix 20 mg po b.i.d. times seven days. 3. k-ciel 20 milliequivalents po b.i.d. times seven days. 4. colace 100 mg po b.i.d. 5. zantac 150 mg po b.i.d. 6. labetalol 40 mg po b.i.d. 7. percocet 5/325 one to two tablets po q 4 hours prn. 8. ibuprofen 600 mg po q 6 hours prn. 9. coumadin 3 mg po on . blood is to be drawn on and the results are to be faxed to his primary care physician . office who will determine further coumadin dosing. discharge diagnoses: 1. aortic regurgitation. 2. status post aortic valve replacement. th is to follow up with his primary care physician . in one to two weeks and by phone on for a coumadin dose. the patient is to follow up with dr. his cardiologist in one to two weeks. the patient is to follow up with dr. in four weeks. the patient is to be discharged to home in stable condition. , m.d. dictated by: medquist36 procedure: extracorporeal circulation auxiliary to open heart surgery diagnostic ultrasound of heart open and other replacement of aortic valve diagnoses: cardiac complications, not elsewhere classified other specified cardiac dysrhythmias long-term (current) use of anticoagulants obesity, unspecified congenital insufficiency of aortic valve encounter for therapeutic drug monitoring 

Answer: The patient is high likely exposed to