Why Do I Feel My Heart Beating Fast Sometimes?

Occasional episodes of a fast heartbeat can be triggered by:

• Stress or anxiety
• Excess caffeine
• Energy drinks
• Lack of sleep
• Dehydration
• Intense exercise

Most brief episodes are harmless, but medical attention is recommended if symptoms are accompanied by:

• Chest pain
• Dizziness
• Fainting
• Shortness of breath

Keeping track of when episodes occur may help identify triggers.