Final answer:
If a patient with a DNR order has a heart attack during an IVP, you should not perform CPR and instead provide comfort measures and notify the healthcare provider.
Step-by-step explanation:
If a patient has a Do Not Resuscitate (DNR) order stated in their chart and they experience a heart attack during an Invasive Cardiovascular Procedure (IVP), the appropriate action is not to begin CPR. Respecting the patient's wishes and the DNR order, you should do nothing in terms of resuscitation efforts. However, it is important to provide comfort measures and supportive care for the patient, and notify the healthcare provider who is responsible for the patient's care.