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: this 62-year-old man has a history of mitral valve disease and paroxysmal atrial fibrillation. his most recent echocardiogram is from where the ef was noted at greater than 60 percent with mild lvh and a mildly dilated left ventricular cavity. there was moderate dilation of the left atrium. the mitral valve leaflets were myxomatous and mildly thickened with moderate-to-severe mitral valve prolapse and 2 plus mitral regurgitation. his most recent stress test was in and did not reveal any objective evidence of ischemia. he denies chest discomfort, shortness of breath, fatigue, or dizziness. in terms of his atrial fibrillation, he reports that he has not had any episodes in several months. he is referred not to be anticoagulated with coumadin and is on daily aspirin therapy along with propafenone. denies claudication, edema, orthopnea, pnd, or lightheadedness. past medical history: mitral valve disease, paf, history of remote prior dccp, and also bph; also decreased bone density, currently enrolled in a research trial at ; and mild arthritis. his history is negative for tia and negative for cva, negative for melena or gi bleed. past surgical history: tonsillectomy. allergies: no known drug allergies. medications: on admission, 1. aspirin 325 mg p.o. q.d. 2. moexipril 5 mg p.o. q.d. 3. proscar 15 mg p.o. q.d. 4. propafenone 150 mg p.o. t.i.d. 5. parathyroid hormone injection daily ( study). 6. tums. 7. vitamins. 8. glucosamine. physical examination: on exam, he is a 62-year-old man, in no acute distress. heent: pupils equal, round, and reactive to light; eomi. neck and throat, benign. pulmonary: lungs are clear to auscultation bilaterally. cardiovascular: regular rate and rhythm. abdomen: benign. extremities: slight peripheral edema bilaterally. neurological: alert and oriented x3. laboratory data: his labs as of , a cbc and a chem-7 within normal limits and inr of 1.1. hospital course: the patient was admitted on and went to the operating room on that day for a minimally invasive mitral valve replacement/maze/repair of the right femoral artery and placement of a 33 mm mosaic porcine mitral valve. he underwent general anesthetic with endotracheal tube and did well on the surgery with minimal blood loss. he also had pacer wires placed at this time. the following day, he was weaned off levophed in the evening. he was alert and oriented. his lungs were clear and his physical exam was benign. he was transferred from the csru to the floor on . while on the floor, he experienced atrial fibrillation and was started on heparin. he was converted with the assistance of his pacer wires, but remained on the heparin and began coumadin on . pacer wires were removed on that day and he was discharged home with instructions for 2 days of coumadin and an inr check on monday. discharge condition: good. discharge diagnoses: 1. status post mitral valve replacement, maze, femoral artery repair on . 2. benign prostatic hypertrophy. 3. arthritis. 4. osteopenia. discharge medications: 1. aspirin 325 mg tablet p.o. q.d. 2. pantoprazole sodium 40 mg tablet p.o. q.d. 3. finasteride 5 mg tablet 3 tablets p.o. q.d. 4. propafenone hcl 150 mg tablet p.o. t.i.d. 5. acetaminophen 325 mg tablet 2 tablets p.o. q.4 h. p.r.n. pain. 6. oxycodone/acetaminophen 5/325 mg tablet 1 to 2 tablets p.o. q.4 h. p.r.n. pain. 7. warfarin sodium 5 mg tablet p.o. q.d. for 2 doses. note, blood test for inr monday, . 8. metoprolol tartrate 50 mg tablet p.o. b.i.d. 9. furosemide 40 mg tablet p.o. b.i.d. for 1 week. 10. potassium chloride 20 meq packet p.o. b.i.d. for 1 week. note, hold for potassium greater than 4.5. recommended followup: the patient is to follow up with dr. on at 04:15 p.m.; also to follow up with dr. , and that appointment should be made in 1 month. , m.d. procedure: extracorporeal circulation auxiliary to open heart surgery intraoperative cardiac pacemaker other electric countershock of heart excision or destruction of other lesion or tissue of heart, open approach open and other replacement of mitral valve with tissue graft diagnoses: mitral valve disorders unspecified essential hypertension atrial fibrillation hypertrophy (benign) of prostate without urinary obstruction and other lower urinary tract symptom (luts) disorder of bone and cartilage, unspecified 

Answer: The patient is high likely exposed to