Dreams that evoke feelings of being out of control and experiencing high heart rates can symbolize anxiety or stress in your waking life. The specific rhythm you mentioned, like 240 bpm, could represent overwhelming emotions or situations that feel chaotic or unmanageable.

When these dreams occur, especially in childhood, they may reflect fears or pressures you were experiencing during that time. They could also signify a sense of vulnerability or fear of the unknown.

To gain further insight, consider what was happening in your life during those childhood years. Were there any significant changes, fears, or pressures? Reflecting on these experiences might help you understand the root of the emotions tied to these dreams.

If you’re still experiencing similar feelings in your dreams, it could be beneficial to explore stress management techniques or relaxation practices to alleviate anxiety.