In most cases, accessory pathways have bidirectional conduction, and so may lead to preexcitation patterns on the ECG as well as SVT. This is known as Wolff-Parkinson-White syndrome, although this term is sometimes used to simply refer to ventricular preexcitation.

What causes SVT to develop?

SVT is usually a result of faulty electrical signaling in your heart. It's commonly brought on by premature beats. Some types of SVT run in families, so genes may play a role. Other types may be caused by lung problems.

Does Wolff-Parkinson-White Syndrome cause SVT?

If you have WPW syndrome, you may experience episodes where your heart suddenly starts racing, before stopping or slowing down abruptly. This rapid heart rate is called supraventricular tachycardia (SVT). During an episode, you may experience symptoms such as: a pounding or fluttering heartbeat (heart palpitations)