Menu Healthy Lifestyle Diseases & Conditions First Aid Symptoms Tests & Procedures Videos Definitions FAQs BradycardiaUpdated: 2018-05-25When to seek immediate medical careSee a doctor immediately if: Fainted, or nearly fainted Difficulty breathing Chest pain When to make a doctor's appointmentMake an appointment to see a doctor if: Dizziness Weakness Fatigue Tiring easily with activity © 1998-2022 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use