Final answer:
Possible causes of heart rate variations include a patient's history of present illness, family history, review of systems, and social history.
Step-by-step explanation:
Causes of Heart Rate Variations
- History of present illness: A patient's medical history, including their current symptoms, can provide insights into potential causes of abnormal heart rate.
- Family history: Genetic factors can play a role in heart rate variations. A family history of heart conditions may increase the risk.
- Review of systems: Evaluating the overall physical health of a patient can help identify underlying conditions that may impact heart rate.
- Social history: Lifestyle factors, such as smoking, excessive alcohol consumption, and drug use, can contribute to heart rate abnormalities.