Overview
Supraventricular tachycardia (SVT) is a fast heart rate that starts in your upper heart chambers. When your heart is beating too fast at rest, it makes it hard to send enough blood to your body. Episodes can go on for seconds to hours.
When your heart beats too quickly, there’s not enough time for your heart chambers to fill with blood before they contract.
If you have symptoms, you may think something doesn’t feel right in your chest. Although it may be difficult, noting the details of what you’re experiencing can help a healthcare provider make a diagnosis.
Types of SVT
Different kinds of SVT include:
- Premature atrial contractions (PACs).
- Paroxysmal supraventricular tachycardia (PSVT).
- Accessory pathway tachycardias like Wolff-Parkinson-White (WPW) syndrome.
- AV (atrioventricular) nodal reentrant tachycardia (AVNRT).
- Atrial tachycardia.
- Atrial fibrillation.
- Atrial flutter.
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