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: allergies: patient recorded as having no known allergies to drugs attending: chief complaint: syncope major surgical or invasive procedure: - avr(19mm st. regent sa mechanical valve) - placement of ( sigma sdr303 d - ddd mode) history of present illness: the patient is a 43-year-old woman who has a history of aortic stenosis with syncope. workup demonstrated severe aortic stenosis with aortic valve area calculated to be less than 1 cm squared. the patient had a diagnostic cardiac cath done approximately a year ago, which showed normal coronaries with a left dominant system. the patient was therefore referred for an aortic valve replacement. past medical history: migraines bicuspid aortic valve ?hypothyroid social history: lives in with husband and 3 children. denies smoking history. drinks socially ( drinks/week). family history: father cabg in 60's / mother with cardiomyopathy in 60's physical exam: avss heent: ncat, perrl, anicteric sclera, op benign, teeth in good repair heart: rrr, 4/6 sem->carotids lungs ctab extrem warm, no edema pertinent results: echo - post cpb there is normal biventricular systolic function. left ventricular diastolic size is small, consistent with decreased preload. there is a bileaflet mechanical prosthesis located in the aortic position. it is well seated and both leaflets can be seen moving. there is mild ai in total, which is normal for this valve. there may be a small perivalvular jet though this can not be well seen. the maximum gradient through the valve is about 16 mm hg (the recorded table showing a gradient of 28 is an error). initially when coming off of cpb, there was a rhythm abnormality that resulted in increased mr. rhythm was reestablished, the mr was back down to pre-cpb levels. cxr status post median sternotomy and avr. heart size is within normal limits. there are small bilateral pleural effusions with associated atelectasis at the lung bases, but no definite pulmonary edema. there is a dual-chamber left-sided with atrial and ventricular leads in situ, in good location. no pneumothorax. impression: bilateral pleural effusions, slightly smaller than on prior film. no evidence for pulmonary edema. no pneumothorax or chf. no change in location of pacer leads. 07:50am blood wbc-8.6 rbc-2.91* hgb-9.1* hct-27.6* mcv-95 mch-31.2 mchc-33.0 rdw-13.4 plt ct-289 07:45am blood pt-17.2* ptt-29.5 inr(pt)-1.6* 07:50am blood pt-23.6* ptt-98.2* inr(pt)-2.4* 09:52pm blood pt-19.9* ptt-52.1* inr(pt)-1.9* 06:35am blood glucose-104 urean-9 creat-0.6 na-137 k-4.2 cl-102 hco3-29 angap-10 brief hospital course: she was taken to the operating room on where she underwent an avr with a . regent sa mechanical valve. she was transferred to the csru in critical but stable condition. she was extubated and weaned from her vasoactive drips later that same day. postoperatively she was found to be in complete heart block requiring epicardial pacing. she was seen in consultation by electrophysiology who followed closely. she was started on heparin for her mechanical valve. she remained in complete heart block and a permenant was placed on . she was then transferred to the floor. she was started on coumadin for her mechcanical valve. she awaited therapeutic inr, and was ready for discharge on pod #****. medications on admission: mucinex, synthroid, lasix, augmentin, lisinopril, kcl discharge medications: 1. atorvastatin 10 mg tablet sig: one (1) tablet po daily (daily). disp:*30 tablet(s)* refills:*0* 2. docusate sodium 100 mg capsule sig: one (1) capsule po bid (2 times a day). disp:*60 capsule(s)* refills:*0* 3. aspirin 81 mg tablet, delayed release (e.c.) sig: one (1) tablet, delayed release (e.c.) po daily (daily). disp:*30 tablet, delayed release (e.c.)(s)* refills:*0* 4. levothyroxine 50 mcg tablet sig: one (1) tablet po daily (daily). disp:*30 tablet(s)* refills:*0* 5. pantoprazole 40 mg tablet, delayed release (e.c.) sig: one (1) tablet, delayed release (e.c.) po q24h (every 24 hours). disp:*30 tablet, delayed release (e.c.)(s)* refills:*0* discharge disposition: home with service discharge diagnosis: bicsupid aortic valve migraine hypothyroid discharge condition: good. discharge instructions: 1) monitor wounds for signs of infection. these include redness, drainage or increased pain. 2) report any fever greater then 100.5. 3) report any weight gain of 2 pounds in 24 hours or 5 pounds in 1 week. 4) no lotions, creams or powders to incision until it has healed. you may shower and wash incision. no bathing or swimming for 1 month. use sunscreen on incision if exposed to sun. 5)no lifting greater then 10 pounds for 10 weeks. 6)no driving for 1 month. followup instructions: follow-up with dr. in 1 month. (. follow-up with cardiologist dr. ( . st. medical center 8:45 am for pacer check and coumadin check. provider: clinic phone: date/time: 9:30 provider: call phone: date/time: 5:30 lab monday for inr check procedure: extracorporeal circulation auxiliary to open heart surgery initial insertion of dual-chamber device initial insertion of transvenous leads [electrodes] into atrium and ventricle open and other replacement of aortic valve diagnoses: acidosis unspecified acquired hypothyroidism cardiac complications, not elsewhere classified aortic valve disorders pulmonary collapse atrioventricular block, complete congenital insufficiency of aortic valve migraine, unspecified, without mention of intractable migraine without mention of status migrainosus 

Answer: The patient is high likely exposed to