SN instructed patient/ caregiver that Bradycardia can be a serious problem if the heart doesn't pump enough oxygen-rich blood to the body. For some people, however, bradycardia doesn't cause symptoms or complications.SN explained that If you have bradycardia, your brain and other organs might not get enough oxygen, possibly causing these symptoms: Near-fainting or fainting (syncope) Dizziness or lightheadedness, Fatigue, Shortness of breath, Chest pains, Confusion or memory problems, Easily tiring during physical activity.If you faint, have difficulty breathing or have chest pain lasting more than a few minutes, get emergency care or call 911 or your local emergency number.