Not all arrhythmias cause symptoms. Some may be only discovered during a routine medical check-up.

Arrhythmias may have classic symptoms such as a sensation of racing or thumping in the chest, but often the symptoms may seem unrelated.

Bradycardia

Arrhythmias that have a slow heart rate may cause:

• Shortness of breath
• Weakness
• Fatigue
• Lightheadedness or dizziness
• Fainting spells
• Falls
• Chest discomfort

Tachycardia

Arrhythmias that have a fast heart rate may cause:

• A fluttering feeling in your chest
• Shortness of breath
• Lightheadedness or dizziness
• Chest discomfort

Last Updated February 2023