When your heart is beating too fast, it may not pump enough blood to the rest of your body. This can starve your organs and tissues of oxygen and can cause the following tachycardia-related signs and symptoms:
- Shortness of breath
- Rapid pulse rate
- Heart palpitations a racing, uncomfortable or irregular heartbeat or a sensation of “flopping” in the chest
- Chest pain
- Fainting (syncope)
Some people with tachycardia have no symptoms, and the condition is only discovered during a physical examination or with a heart-monitoring test called an electrocardiogram.