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: discharge medications: 1. colace 100 mg p.o. twice a day. 2. zantac 150 mg p.o. twice a day. 3. thyroid replacement 50 micrograms p.o. q. day. 4. lasix 20 mg twice a day times seven days. 5. potassium chloride 20 meq twice a day times seven days. 6. amiodarone 400 mg p.o. q. day times one month, and then to decrease to 200 mg p.o. q. day. 7. lopressor 12.5 mg p.o. twice a day. 8. coumadin 1 mg p.o. q. day today , as well as and . discharge instructions: 1. on , mr. has an appointment with dr. at 11 a.m. and dr. will follow his coumadin dosing at that time. 2. the patient is also to follow-up with dr. in four weeks. , m.d. dictated by: medquist36 procedure: extracorporeal circulation auxiliary to open heart surgery other electric countershock of heart pulmonary artery wedge monitoring other operations on heart and pericardium monitoring of cardiac output by other technique open heart valvuloplasty of mitral valve without replacement diagnoses: other primary cardiomyopathies coronary atherosclerosis of native coronary artery mitral valve disorders unspecified essential hypertension unspecified acquired hypothyroidism atrial fibrillation other specified diseases of pericardium first degree atrioventricular block 

Answer: The patient is high likely exposed to