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: history of present illness: a 55-year-old man, with a history of a murmur since childhood. an echo done 15 years ago showed no aortic dilatation. he has not had one since that time. a recent echo in showed moderate lv enlargement with an ef of 55 percent, bicuspid aortic valve with a dilated root and ascending aorta to 5.8 cm at the level of the valve, no as, trace ai, trace mr, 1 plus tr. he was then referred for cardiac catheterization. cath done on showed normal coronaries with a dilated root and ascending aorta and an ef of 55 percent. past medical history: hypertension. arrhythmias. isolated pvcs. tension migraine headaches. environmental allergies. shingles. chronic sinusitis. hemorrhoids. bph. low back pain. tonsillectomy. appendectomy. allergies: he states no known drug allergies. medications prior to admission: 1. atenolol 25 mg once daily. 2. ferrous sulfate 325 . 3. xanax prn. 4. singulair 10 once daily. 5. zyrtec 10 once daily. 6. paxil 30 once daily. 7. altace 5 once daily. family history: father died at age 64 from an mi. mother had labile hypertension. social history: the patient is married, lives with his wife. has one adult daughter. as a biomedical engineer. denies tobacco. alcohol - one drink per week. denies recreational drug use. the patient had a chest ct in that showed an ascending aortic dilatation to a maximum of 5.2 cm from level of the aortic root to the level of the brachiocephalic arteries. physical examination: vital signs: heart rate 64, blood pressure 110/68, respiratory rate 18, height 6 feet 1 inch, weight 220. general: well-appearing 55-year-old man in no acute distress. skin: no lesions. heent: pupils equally round and reactive to light. extraocular movements intact. normal buccal mucosa, nonicteric. neck is supple with no jvd and no bruits. chest is clear to auscultation bilaterally. cardiovascular: regular rate and rhythm, s1, s2, with a i/vi systolic ejection murmur. abdomen is soft, nontender, nondistended with hypoactive bowel sounds, and hepatosplenomegaly, or cva tenderness. extremities are warm and well-perfused with no clubbing, cyanosis or edema. no varicosities. neuro: cranial nerves ii through xii grossly intact. nonfocal exam. pulses are 2 plus throughout. carotids with no bruits. lab data: white count 9, hematocrit 39, platelets 245, ptt 24, inr 1.1, sodium 142, potassium 4.1, chloride 106, co2 26, bun 14, creatinine 0.9, glucose 107. hospital course: as stated previously, the patient was a direct admission to the operating room on where he underwent a bentall with number 29 homograft. his bypass time was 168 minutes. his crossclamp time was 139 minutes. he tolerated the operation well and was transferred from the operating room to the cardiothoracic intensive care unit. at the time of transfer, the patient was a-paced at 91 beats per minute with a mean arterial pressure of 72. he had nitroglycerin at 0.3 mcg/kg/min, and propofol at 20 mcg/kg/min. the patient did well in the immediate postoperative period. his anesthesia was reversed. he was weaned from the ventilator and successfully extubated. he remained hemodynamically stable throughout the operative day. on postoperative day 1, the patient continued to be hemodynamically stable. his central lines were discontinued, and he was transferred to the floor for continuing postoperative care and cardiac rehabilitation. on postoperative day 2, the patient continued to be hemodynamically stable. his chest tubes, as well as his foley catheters were removed. his activity level was advanced with the assistance of the nursing staff, as well as the physical therapy staff. on postoperative day 3, his temporary pacing wires were removed. he was begun on beta blockade, and his activity level was further advanced. on postoperative day 4, it was decided that the patient was stable and ready to be discharged home. at the time of this dictation, the patient's physical exam, temperature 98.3, heart rate 56/sinus brady, blood pressure 98/58, respiratory rate 18, weight 107.1, preoperatively 100. hematocrit 26.7, sodium 141, potassium 4.7, chloride 104, co2 32, bun 13, creatinine 0.8, glucose 123, mag 2.1. physical exam: alert and oriented x 3. moves all extremities. nonfocal exam. pulmonary: clear to auscultation bilaterally. cardiac: regular rate and rhythm, s1, s2, with no murmur. sternum is stable. incision with steri-strips, open to a air, clean and dry. abdomen is soft, nontender, nondistended with normoactive bowel sounds. extremities are warm and well-perfused with no edema. condition at discharge: good. he is to be discharged to home with visiting nurses. discharge diagnoses: status post bentall with a number 29 homograft. migraines. shingles. sinusitis. hemorrhoids. benign prostatic hypertrophy. low back pain. tonsillectomy. appendectomy. discharge medications: 1. aspirin 81 mg once daily. 2. lasix 20 mg x 7 days. 3. colace 100 mg . 4. zantac 150 mg . 5. paxil 30 mg once daily. 6. singulair 10 mg once daily. 7. ferrous sulfate 325 once daily. 8. ascorbic acid 500 . 9. lopressor 25 . 10.potassium chloride 20 meq once daily x 7 days. 11.percocet 5/325, 1 tablet q 4-6 hours prn for pain. fop: the patient is to have follow-up with dr. in 4 weeks, and follow-up with dr. in weeks, and follow-up with dr. also in weeks. , m.d. procedure: extracorporeal circulation auxiliary to open heart surgery diagnostic ultrasound of heart open and other replacement of aortic valve with tissue graft resection of vessel with replacement, thoracic vessels other operations on vessels of heart transfusion of previously collected autologous blood diagnoses: thoracic aneurysm without mention of rupture cardiac complications, not elsewhere classified atrial fibrillation surgical operation with anastomosis, bypass, or graft, with natural or artificial tissues used as implant causing abnormal patient reaction, or later complication, without mention of misadventure at time of operation congenital insufficiency of aortic valve other and unspecified rheumatic aortic diseases 

Answer: The patient is high likely exposed to