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:nkda. pmh:af s/p ablation. asd repair-83'. 3+ mitral stenosis norm coronaries. o:neuro=a&ox3. cooperative & . pulm=breaths sounds=clear. o2 4l nc w sats upper 90's. neg i&0-lasix given on evenings. cv=remains in accelerated junctional rhythm-rate 70's w bp 102/59/74. dopa @ 2mcg/kg/min. epicardial wires intact-to pacer-vvi w rate 50. gi=c/o sl abd discomfort-up to commode wo success. pos bowel sounds. wo flatus. gu=voiding. neg approx 2l @ 2300. access=r-rad aline & rij introducer. id=low grade t-99.4po. labs=am sent. hct 25. a:remains in accelerated junctional rhythm-rate great then set pacer rate. hct down to 25. p:?wean d/c dopamine. ?perm pacer. follow t. reck hct. support as needed. procedure: extracorporeal circulation auxiliary to open heart surgery other electric countershock of heart open and other replacement of mitral valve diagnoses: mitral valve disorders cardiac complications, not elsewhere classified atrial fibrillation other chronic pulmonary heart diseases other specified cardiac dysrhythmias atrioventricular block, complete surgical operation with implant of artificial internal device causing abnormal patient reaction, or later complication,without mention of misadventure at time of operation 

Answer: The patient is high likely exposed to