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: allergies: no known allergies / adverse drug reactions attending: addendum: at the time of discharge, there was slight serosanguinous drainage from the sternal incision yet there was no sign of infection. he was discharged with keflex and a plan to return for a wound check to 6 on monday . discharge disposition: home with service facility: tba md procedure: extracorporeal circulation auxiliary to open heart surgery open and other replacement of aortic valve diagnoses: tobacco use disorder congestive heart failure, unspecified chronic airway obstruction, not elsewhere classified atrial fibrillation aortic valve disorders long-term (current) use of anticoagulants other diseases of lung, not elsewhere classified chronic diastolic heart failure abdominal aortic ectasia 

Answer: The patient is high likely exposed to