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: the patient is a 61-year-old male who presents with a history of dysrhythmias and shortness of breath with some premature ventricular contractions and is found to have a dilated left ventricle with normal systolic and diastolic function, and severe mitral valve prolapse, dilated aortic root and left atrium. past medical and surgical history: significant only for tonsillectomy and adenoidectomy as a child. medications at home: atenolol 25 mg once a day, which had just been started. allergies: no known drug allergies. he had dentures on the upper and lower parts. family history: noncontributory. social history: he lives with his wife and used to smoke very remotely in the distant past. he denied any ethanol abuse. physical examination: significant for grade iii to iv/vi late systolic murmur with a click, and otherwise unremarkable. laboratory data: cbc was 6.1,41.2 and 175. chemistry 140/4.7/102/30/19/1.1/7.4, with pt of 12.8, ptt of 34.7. preoperative chest x-ray was within normal limits. electrocardiogram revealed normal sinus rhythm. ho course: the patient was taken to the operating room on for mitral valve replacement using a mechanical valve with dr. . the patient was then postoperatively transferred to the cardiac intensive care unit, where he did well. he was weaned. his electrolytes were replaced, and he was transferred to the floor. the next day, his chest tubes were discontinued. his foley was discontinued. his wires were discontinued. his anticoagulation was begun, and the patient was encouraged to ambulate. upon discharge, he is a level v. he is to follow up with his primary care provider and cardiologist. arrangements for the anticoagulation of his blood range from 3 to 3.5 will be achieved on an outpatient basis. he was given a prescription for coumadin. his discharge medications include metoprolol 12.5 mg by mouth three times a day, potassium chloride 20 meq twice a day, lasix 20 mg by mouth twice a day, the last two for one week only, colace 100 mg by mouth twice a day, ranitidine 150 mg by mouth twice a day, aspirin 325 mg by mouth once daily, percocet as needed for pain #40 given, coumadin 1 mg, and he is to be given directed dose as per the attending physician. follow up with dr. and his primary care physician. upon discharge, his physical examination is unremarkable. his sternal wound is clean and dry, no click and no erythema, and no jugular venous distention. breath sounds are positive bilaterally. post-chest tube pull showed no significant pneumothorax or pulmonary congestion. , m.d. dictated by: medquist36 procedure: extracorporeal circulation auxiliary to open heart surgery open and other replacement of mitral valve diagnoses: mitral valve disorders 

Answer: The patient is high likely exposed to