The nurse notes the patient in Sierra Leone has anemia on peripheral blood smear. The patient reports pins and needles in both feet and mouth soreness. Which condition explains the patient's symptoms?

The 72-year-old patient is brought via the ambulance to the emergency department after his wife observed him collapsing after dinner. At the scene, emergency medical service (EMS) personnel determined he was in asystole, and began cardiopulmonary resuscitation (CPR). An advanced airway was placed and a peripheral intravenous catheter was inserted. The defibrillator was placed and read ventricular fibrillation; a shock was administered, chest compressions were restarted, and a 1 mg epinephrine dose was administered via peripheral IV. Upon arrival to the emergency department, the patient was found to be in pulseless electrical activity after 5 complete rounds of CPR (including epinephrine, defibrillation, and 30:2 chest compressions to ventilated breaths ratio). The nurse advocates for which intervention?

A 41-year-old male complains of sudden onset of severe chest pain and describes it as a constant tearing sensation that radiates to his lower back. The nurse is most suspicious of which condition?