Typical symptoms of a low heart rate include weakness, dizziness, memory problems and shortness of breath, according to Mayo Clinic. These symptoms occur due to an insufficient supply of oxygen to the brain and other vital body organs.
A slow heart rate is not necessarily an indication of health problems, particularly in athletes and healthy young people, says WebMD. However, to some people, this condition is a sign of problems with the electrical system of the heart, especially for individuals aged 65 years and over.
Common causes of abnormally slow heartbeat include heart tissue damage, high blood pressure, disruption of breathing during sleep, and an inflammatory disease such as lupus or rheumatic fever, notes Mayo Clinic.