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: 1. hypertension. 2. mitral regurgitation. 3. benign prostatic hypertrophy. 4. osteoarthritis. 5. left leg deformity. 6. weakness in right arm. 7. status post appendectomy. social history: the patient is married and lives at home with his wife. denies tobacco or etoh use. allergies: no known drug allergies. preoperative medications: 1. lasix 80 mg p.o. q day. 2. potassium chloride 10 meq p.o. q day. 3. doxazosin 4 mg p.o. q day. 4. valsartan 160 mg p.o. q day. 5. atenolol 50 mg p.o. b.i.d. 6. aspirin 81 mg p.o. q day. ho course: the patient was admitted to on and was taken to the cardiac catheterization laboratory. in the laboratory, the patient was found to have an ejection fraction of 45 percent, left ventricle end-diastolic pressure of 18, pulmonary capillary wedge pressure of seven and pulmonary artery pressures of 25/8. coronary angiography showed no obstructive coronary artery disease. the patient was taken to the operating room on with dr. for a mitral valve replacement with a 29 mm porcine valve. please see operative note for full details. total cardiopulmonary bypass time was ninety minutes. cross-clamp time was sixty-seven minutes. the patient was transferred to the intensive care unit in stable condition on dobutamine and levophed infusions. the patient was weaned and extubated from mechanical ventilation on the first postoperative day. the dobutamine was weaned to off. the patient had adequate cardiac indices. the patient continued on levophed for maintaining adequate perfusion pressure. the patient's pulmonary artery catheters were removed on postoperative day one. the patient was started on lasix for diuresis. the levophed was weaned to off by postoperative day three. the patient was started on low-dose lopressor and the patient was transferred from the intensive care unit to the regular part of the hospital. postoperatively, the patient was noted to have mild thrombocytopenia with a platelet count of 88. by postoperative day three, the patient's platelet count had risen back up to over 100 without any intervention. the patient's pacing wires were removed on postoperative day four. the patient began ambulating with physical therapy. the patient had been started on low-dose lasix which he was responding to well. lasix was converted to p.o. the patient had persistent tachycardia in spite of being on increasing doses of lopressor. the patient was switched to atenolol, which he was on at home, with good control of his heart rate. on postoperative day six, the patient had been cleared by physical therapy and was cleared for discharge to home. condition on discharge: t-max 100.1, pulse 90 in sinus rhythm, blood pressure 125/65, respiratory rate 18, room air oxygen saturation 95 percent. laboratory data: white blood cell count 8.9, hematocrit 32.5, platelet count 145, sodium 136, potassium 4.1, chloride 102, bicarbonate 25, bun 24, creatinine 1.0 and glucose 103. physical examination: general: the patient's weight on is 97.4 kg. preoperatively, the patient weighed 98.9 kg. neurological: neurologically, the patient is awake, alert and oriented times three. his examination is nonfocal. cardiac: his heart is regular rate and rhythm without rub or murmur. respiratory: his breath sounds are clear bilaterally, decreased at the left base. gastrointestinal: abdomen is obese, positive bowel sounds, soft, nontender, nondistended. the patient is tolerating a regular diet and having bowel movements. skin: sternal incision is clean, dry and intact. the steri- strips are intact. there is no erythema or drainage. extremities: warm and well perfused. there is plus lower extremity edema. discharge diagnoses: 1. mitral regurgitation. 2. mitral valve replacement. 3. hypertension. 4. benign prostatic hypertrophy. discharge medications: 1. colace 100 mg p.o. b.i.d. 2. zantac 150 mg p.o. b.i.d. 3. enteric coated aspirin 325 mg p.o. q day. 4. percocet 5/325 p.o. q 4 hours p.r.n. 5. lasix 40 mg p.o. q day times ten days. 6. potassium chloride 20 meq p.o. q day times ten days. 7. atenolol 50 mg p.o. b.i.d. 8. doxazosin 4 mg p.o. q h.s. follow up: the patient is to follow-up with his primary care physician, . in weeks. the patient is to follow-up with dr. in weeks. the patient is to follow-up with dr. , m.d. in one month. , md procedure: extracorporeal circulation auxiliary to open heart surgery angiocardiography of left heart structures other and unspecified coronary arteriography open and other replacement of mitral valve with tissue graft diagnoses: thrombocytopenia, unspecified mitral valve disorders unspecified essential hypertension hypertrophy (benign) of prostate without urinary obstruction and other lower urinary tract symptom (luts) primary pulmonary hypertension 

Answer: The patient is high likely exposed to