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.
5 Heart Rate Myths Debunked. 1  1. Myth: A normal heart rate is 60-100 beats per minute. 2  2. Myth: An erratic heart rate means I'm having a heart attack. 3  3. Myth: If my pulse is fast, it always means I'm stressed out.