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. hypercholesterolemia. 2. hypertension. past surgical history: laparoscopic surgery for an ovarian cyst. allergies: the patient has no known drug allergies. admission medications: 1. multivitamin daily. 2. aspirin daily. social history: she is married and lives at home with her husband. however, her daughter and son both will be arriving from to stay with the patient after her surgery. physical examination on admission: height 5' 1", weight 175 pounds. vital signs: heart rate 70, sinus rhythm, blood pressure 120/80, respiratory rate 18, 02 saturation 97% on room air. heent: the neck was supple with radiating as murmur. lungs: clear bilaterally. heart: the heart sounds were a regular rate and rhythm. there was a iii/vi systolic ejection murmur. abdomen: soft, nontender, nondistended. extremities: warm and well perfused with bilateral dorsalis pedis and posterior tibial pulses and no edema. laboratory/radiologic data: preoperatively, the white count was 4.9, hematocrit 39.3, platelets 205,000. sodium 143, potassium 4.6, chloride 108, c02 27, bun 18, creatinine 0.9, glucose 114. hospital course: on , the patient was brought to the catheterization laboratory for cardiac catheterization. please see the catheterization report for full details and summary of the catheterization that showed normal coronaries with an aortic valve area of 0.4 cm squared, normal lv function and no mr. the echocardiogram previously referred to on showed a peak gradient of 82 mmhg with a mean gradient of 44 mmhg and an aortic valve area of 0.5 cm squared. on , the patient was brought to the operating room. please see the or report for full details. in summary, the patient underwent a minimally invasive aortic valve replacement with a #23 st. mechanical valve. her bypass time was 138 minutes with a cross-clamp time of 112 minutes. she tolerated the operation well and was transferred from the operating room to the cardiothoracic intensive care unit. she did well in the immediate postoperative period. her anesthesia was reversed. she was weaned from the ventilator and successfully extubated. she remained hemodynamically stable throughout the day of her surgery. all vasoactive drips were weaned to off within the first 24 hours. on postoperative day number one, the patient was noted to have one episode of rapid atrial fibrillation with a heart rate of 150-160 that responded to iv lopressor at which point she converted back to normal sinus rhythm. also, on postoperative day number two, the patient's chest tubes, swan-ganz catheter and foley catheter were removed and she was transferred from the cardiothoracic icu to ii for continuing postoperative care and cardiac rehabilitation as well as initiation of anticoagulation for her mechanical valve. once on the floor, with the assistance of the nursing staff and physical therapy, the patient's activity level was increased and after several days of coumadin, the patient's inr had increased sufficiently so that on postoperative day number five, it was decided that the patient was stable and ready to be discharged to home. at the time of discharge, the patient's physical examination is as follows. vital signs: temperature 98.3, heart rate 74, sinus rhythm, blood pressure 138/78, respiratory rate, 02 saturation 92% on room air. weight preoperative was 83 kilograms, at discharge is 88.9 kilograms. laboratory data revealed a white count of 8.0, hematocrit 27.8, platelets 297,000. pt 17.9, ptt 88.3, prior to discontinuing of her heparin, and inr was 2.1. sodium 143, potassium 3.9, chloride 102, c02 29, bun 13, creatinine 0.9. on physical examination, she was alert and oriented times three, moves all extremities, follows commands. respiratory: clear to auscultation bilaterally. cardiac: regular rate and rhythm with a loud mechanical click. abdomen: soft, nontender, nondistended, normoactive bowel sounds. extremities: warm and well perfused with trace pedal edema. sternal wound with steri-strips is open to air, clean and dry. the sternum is stable. discharge medications: 1. lasix 20 mg q.d. times 14 days. 2. potassium 20 meq q.d. times 14 days. 3. toprol xl 150 mg q.d. 4. coumadin 7.5 mg on , the date of discharge, and then as directed by dr. . 5. percocet 5/325 one to two tablets q. four hours p.r.n. discharge diagnosis: 1. aortic stenosis, status post aortic valve replacement with a #23 st. mechanical valve. 2. hypertension. 3. hypercholesterolemia. condition on discharge: good. diion: she is to be discharged home with vna. she is to have follow-up in the clinic in two weeks. follow-up with dr. in four weeks. follow-up with dr. in four weeks. her inr is to be followed by dr. coumadin nurse, , who will contact the patient on regarding inr checks and coumadin dosing. , m.d. dictated by: medquist36 procedure: extracorporeal circulation auxiliary to open heart surgery combined right and left heart cardiac catheterization coronary arteriography using two catheters angiocardiography of left heart structures diagnostic ultrasound of heart open and other replacement of aortic valve diagnoses: pure hypercholesterolemia unspecified essential hypertension cardiac complications, not elsewhere classified atrial fibrillation aortic valve disorders 

Answer: The patient is high likely exposed to