Final answer:
The EKG technician should enter the statement "I have smoked cigarettes for a long time" into the social history section.
Step-by-step explanation:
When entering a patient's history into the electronic health record, the EKG technician should enter the statement "I have smoked cigarettes for a long time" into the social history section.
This information is important because it provides insight into the patient's lifestyle choices and potential risk factors for cardiovascular disease. Smoking is a well-known risk factor for heart disease and including it in the social history section can help healthcare professionals develop appropriate treatment plans.