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Occasional episodes of a fast heartbeat can be triggered by:

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

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

• آلام الصدر
• Dizziness
• Fainting
• Shortness of breath

Keeping track of when episodes occur may help identify triggers.