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: heparin agents attending: addendum: mr. was thrombocytopenic with plt ct= 77. hitt panel sent. results positive via . per dr.: no action to be initiated, no signs of embolization during this admission. plt count recovered to 238 on day of discharge. discharge disposition: home with service facility: all care vna of greater md procedure: (aorto)coronary bypass of three coronary arteries single internal mammary-coronary artery bypass extracorporeal circulation auxiliary to open heart surgery combined right and left heart cardiac catheterization coronary arteriography using two catheters diagnostic ultrasound of heart cardioplegia extraction of other tooth transfusion of packed cells open heart valvuloplasty of mitral valve without replacement diagnoses: other primary cardiomyopathies thrombocytopenia, unspecified anemia, unspecified coronary atherosclerosis of native coronary artery pure hypercholesterolemia mitral valve disorders congestive heart failure, unspecified atrial fibrillation other chronic pulmonary heart diseases other and unspecified hyperlipidemia other specified cardiac dysrhythmias acute systolic heart failure periapical abscess without sinus cardiac dysrhythmia, unspecified chronic periodontitis, unspecified 

Answer: The patient is high likely exposed to