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 allergies/adrs on file attending: chief complaint: cerebral edema and anoxic brain injury major surgical or invasive procedure: expired history of present illness: hpi: 44m with a history of polysubstance abuse was using heroin and "pills" and was found unresponsive. he was not responsive to narcan and was initially pulseless but regained circulation after acls and epi x 3. in the ed at the osh he was moving all extremities but not purposefully. he was admitted to the icu and initiated on hypothermia protocol with sedation and paralysis until at 4am. his pressures were labile--hypertensive and hypotensive at times. he was taken off paralytics and sedation and was still unresponsive. cth was performed demonstrating a sah and cerebral edema. on transfer he is spontaneously breathing but has no other brainstem reflexes (fixed pupils, no oculocephalic reflex, no corneal reflex, no gag reflex). he was transfered to for further management. past medical history: unknown social history: unknown family history: unknown physical exam: physical exam: gcs e: 1v:1 motor:1 o: t:100.3 bp: 127/89 hr: 100 r: 30 o2sats 99% gen: wd/wn, comfortable, nad. heent: pupils: fixed at 3.5mm eoms no movement neck: supple. lungs: scattered rhonchi bilaterally. cardiac: tachycardia reg rhythm. s1/s2. abd: soft, nt, bs+ extrem: warm and well-perfused. no c/c/e. neuro: mental status: intubated not responsive off sedation for 8 hours cranial nerves: i: not tested ii: pupils fixed and dilated. motor: no response to sternal rub or noxious stimuli. reflexes: absent handedness unknown on discharge: expired pertinent results: cth:moderate subarachnoid hemorrhage and diffuse cerebral edema. hypodensity in heads of caudate nucleus and basal ganglia-- anoxic infarcts. 08:00am glucose-133* urea n-8 creat-0.6 sodium-132* potassium-3.9 chloride-100 total co2-22 anion gap-14 08:00am calcium-8.6 phosphate-2.7 magnesium-1.8 05:27am lactate-2.7* 04:31am sodium-134 potassium-4.3 chloride-105 04:31am urine color-yellow appear-clear sp -1.025 04:31am urine blood-neg nitrite-neg protein-neg glucose-neg ketone-neg bilirubin-neg urobilngn-neg ph-6.0 leuk-neg 01:26am glucose-118* urea n-11 creat-0.6 sodium-133 potassium-4.1 chloride-103 total co2-17* anion gap-17 01:26am alt(sgpt)-110* ast(sgot)-97* alk phos-95 tot bili-0.3 01:26am albumin-3.3* calcium-8.2* phosphate-1.5* magnesium-1.9 01:26am wbc-24.9* rbc-4.51* hgb-14.6 hct-42.1 mcv-93 mch-32.3* mchc-34.6 rdw-14.3 01:26am plt count-243 01:26am pt-12.3 ptt-29.6 inr(pt)-1.1 brief hospital course: pt was admited to neurosurgery icu. plan included q1 neurochecks and vital signs, nimodipine 60mg q 4 hours,hob>30 degrees,mannitol,seizure prophylaxis with phyenytoin,strict sbp less < 130 parameters. he was transferred from an osh after being resuscitated following a cardiac arrest. he did not recieve any sedative emdications and was normothermic upon arrival. he was evaluated and found to have a very poor neurologic exam with no corneal reflexes, minimal cough and gag and minimal response to noxious stimuli. imaging showed diffse cerebral edema. he underwent a cta of the brain to assessvasculature and perfusion on which showed hat flow was still occuring at that time. during the course of the day on he no longer had a cough or a gag and he was no longer taking breaths over the vent. a family meeting was had during which the decision was made to make him dnr/dni and the organ bank was notified of his status. the patient continued with his very poor neurologic exam into . the family made the decision to withdraw care in the early afternoon and he passed shortly thereafter with his family at his bedside. organ donation was deferred by the family. medications on admission: unknown discharge medications: none discharge disposition: expired discharge diagnosis: cerebral edema anoxic brain injury discharge condition: expired discharge instructions: expired followup instructions: expired procedure: continuous invasive mechanical ventilation for less than 96 consecutive hours venous catheterization, not elsewhere classified closed [endoscopic] biopsy of bronchus diagnoses: other, mixed, or unspecified drug abuse, unspecified subarachnoid hemorrhage anoxic brain damage cerebral edema do not resuscitate status home accidents poisoning by heroin poisoning by analgesics, antipyretics, and antirheumatics, undetermined whether accidentally or purposely inflicted poisoning by unspecified drug or medicinal substance poisoning by unspecified drug or medicinal substance, undetermined whether accidentally or purposely inflicted 

Answer: The patient is high likely exposed to