The normal heart rate for an adult is between 60-140 beats per minute. If it falls below 60 beats per minute, it is generally referred to as bradycardia. Most patients with bradycardia may not have symptoms, but those who do should be closely monitored. The symptoms of bradycardia mainly arise from a reduced cardiac output, leading to insufficient blood supply to the heart and brain, thereby causing symptoms. Patients may experience dizziness, fatigue, poor mental performance, and other symptoms. Some patients may experience dizziness, transient blackouts before the eyes, fatigue, palpitations, chest tightness, and shortness of breath. In severe cases, patients may also experience fainting.