Paul McCartney wrote this as Hey Jules, a song meant to comfort John Lennon's 5-year-old son Julian as his parents were getting a divorce. The change to Jude was inspired by the character Jud in the musical Oklahoma! (McCartney loves show tunes)
The medical term for a slow heart rate is bradycardia; generally defined as a heart rate below 60 bpm (beats per minute). In contrast, tachycardia means fast heart rate above 100 bpm.
What Is Bradycardia, or Slow Heartbeat? Bradycardia is a heartbeat of less than 60 beats per minute. In most healthy people, a normal heart rate is 60 to 100 beats per minute (BPM). Although a resting heart rate below 60 beats is considered bradycardia, it doesnât always signal a problem. What counts as an abnormally slow heartbeat for one person may not be the same for another. It can be affected by age and physical condition. Athletic adults can have a heart rate below 60 BPM, and that is normal for them. Your heart rate may fall below 60 BPM when you sleep but still be normal.