Dreams involving heartbeats can be quite intense and may reflect underlying emotions or physical sensations. In your case, feeling your heartbeat in the dream, especially in such a dramatic way, might symbolize anxiety, stress, or a sense of urgency in your waking life. The experience of your heart stopping and starting could represent feelings of vulnerability or fear of losing control.

The dream may also echo physical sensations your body was experiencing while you were asleep, as dreams can sometimes merge with real physical states. However, it's important to remember that dreams are not always direct reflections of reality; they often symbolize deeper feelings or concerns.

If you're feeling anxious about the sensations you experienced, it may help to reflect on any stressors in your life or to practice relaxation techniques to alleviate anxiety. If concerns about your heart persist, consider consulting a medical professional for peace of mind.

Overall, your dream highlights a significant emotional experience. Reflecting on it could provide insights into your current feelings or situations that may need attention.