1. Avoid situations that can produce increased myocardial 
      oxygen demand
   2. Stop procedure and allow the patient to rest
   3. Monitor vital signs repeatedly
   4. Place the patient in a semi reclined position
   5. Provide supplemental oxygen

 
Administer sublingual nitroglycerin (0.4 mg) every 5 minutes for three doses; if symptoms are not relieved, assume that the patient is having a myocardial infarction and transport him or her to an appropriate emergency medical facility