It is unclear if the current practice of administration of nitroglycerin in all patients with suspected cardiac chest pain in the field is of benefit. Furthermore, the risk to the patient with STEMI has not been established. The American Heart Association 2010 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care states that "there is insufficient evidence to determine the benefit or harm of initiating nitroglycerin treatment in the prehospital setting or ED." By quantifying the risk of nitroglycerin use for treatment of suspected STEMI in the field and the benefit to pain relief, one can determine if the continued use of this medication for cardiac chest pain in the field is appropriate.