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: the patient has a long-standing, known history of atrial flutter and has been up-titrated on metoprolol as an inpatient with good heart rate control. the day of discharge, the patient developed episodes of atrial flutter (1:2 conduction) with rates in the 140's, which was non-sustained, asymptomatic, and without hemodynamic instability. the patient's potassium level was noted to be low and was repleted. the electrophysiology consulting service was notified, and re-evaluated the patient. it was noted that due to the nature of her structural and valvular atrial flutter, a procedure such as an atrial flutter ablation would not likely benefit the patient. it was recommended that her electrolytes be repleted aggressively, and her metoprolol dose was slightly increased to metoprolol tartarate 125 mg tid. she will be discharged with of hearts monitor in anticipation of her upcoming appointment with dr. in . discharge disposition: extended care facility: tcu - md procedure: incision of cerebral meninges enteral infusion of concentrated nutritional substances diagnoses: coronary atherosclerosis of native coronary artery pure hypercholesterolemia urinary tract infection, site not specified unspecified essential hypertension atrial fibrillation personal history of tobacco use atrial flutter percutaneous transluminal coronary angioplasty status hypopotassemia anxiety state, unspecified long-term (current) use of anticoagulants personal history of malignant neoplasm of large intestine epilepsy, unspecified, without mention of intractable epilepsy other encephalopathy streptococcus infection in conditions classified elsewhere and of unspecified site, streptococcus, group d [enterococcus] subdural hemorrhage late effects of cerebrovascular disease, aphasia acute edema of lung, unspecified essential thrombocythemia 

Answer: The patient is high likely exposed to