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: included chronic atrial fibrillation, osteoporosis, rheumatic heart disease and questionable gastroesophageal reflux disease. past surgical history: included mitral valve commissurotomy in , evacuation of left groin clot in , left shoulder rotator cuff surgery and cholecystectomy. medications on admission: included actonel, toprol xl, lasix, spironolactone, hydrochlorothiazide, coumadin, cardizem cd, calcium, pulmicort turbuhaler, albuterol and stool softener. allergies: the patient has no known drug allergies. social history: the patient is a former three pack a day smoker times 20 years but had quit smoking for 25 years. no alcohol usage. physical examination: patient was noted to be clear to auscultation bilaterally with poor air exchange. no wheezing or rhonchi noted. the patient's heart had a regular rate and a regular rhythm. positive s1, s2. no rales. positive murmur at the apex radiating to the left axilla. hospital course: patient underwent a coronary artery bypass graft times two with the left internal mammary artery to the left anterior descending and saphenous vein graft to descending right coronary artery. the patient also had a mitral valve replacement with a #25 st. mechanical valve and also a maze procedure. the patient tolerated the procedure without complications and continued to be in her chronic state of atrial fibrillation postoperatively and, therefore, was started on coumadin and a beta blocker. the patient had an uncomplicated hospital course and patient was subsequently ready for discharge on postoperative day seven as she was tolerating regular diet, ambulating well with good p.o. pain control and her inr now at adequate range between 3.4. die instructions: the patient was to be going home with dose of coumadin 3 on day of discharge. the first day post discharge the patient will be following up with her primary care physician, . , at the doctor's office at thursday at 8:15 in the morning for a blood test to readjust the dosing of the coumadin and arrange for further follow up in that respect. the patient is also to follow up with dr. in four weeks after discharge and also with cardiology in one to two weeks after discharge. discharge medications: the patient will be going home on lopressor 100 mg p.o. b.i.d., fluticasone propionate 110 mcg two puffs inhaler b.i.d., albuterol one to two puffs inhaler q. 4h. p.r.n., percocet one to two tabs p.o. q. 4h. p.r.n., ibuprofen 400 mg p.o. q. 6h. p.r.n., tylenol 650 mg p.o. q. 4h. p.r.n., aspirin 325 mg p.o. q. day, zantac 150 mg p.o. b.i.d., colace 100 mg p.o. b.i.d., lasix 20 mg p.o. b.i.d., potassium chloride 20 meq p.o. b.i.d., dulcolax, milk of magnesia p.r.n., actonel and generic coumadin 3 mg times two days and then to follow up with dr. for further adjustment. condition at discharge: good. discharge status: to home. discharge diagnosis: status post coronary artery bypass graft times two, mitral valve replacement and maze procedure. , m.d. dictated by: medquist36 d: 17:15 t: 16:41 job#: procedure: single internal mammary-coronary artery bypass extracorporeal circulation auxiliary to open heart surgery diagnostic ultrasound of heart (aorto)coronary bypass of one coronary artery open and other replacement of mitral valve other operations on heart and pericardium diagnoses: coronary atherosclerosis of native coronary artery esophageal reflux atrial fibrillation other and unspecified angina pectoris osteoporosis, unspecified long-term (current) use of anticoagulants rheumatic heart disease, unspecified shortness of breath mitral stenosis with insufficiency 

Answer: The patient is high likely exposed to