An EKG will directly show preexcitation syndrome.
Pre-excitation syndrome, also known as WPW syndrome, occurs when the sinus node in the heart, or between the atria and the ventricles, develops electrical signaling pathways other than the normal electrical signaling pathways, one or more of which between the atria and the ventricles cause all or part of the ventricular muscle to become pre-excited, resulting in specific changes in the ECG, so that the ECG will directly show the preexcitation syndrome.
When short PR intervals and delta waves are recognized on the ECG, it is usually possible to determine that it is preexcitation syndrome. Subsequently, cardiac electrophysiology of the esophagus is also needed to help clarify the diagnosis, and cardiac electrophysiology is used to confirm the diagnosis of preexcitation syndrome.
If a patient develops preexcitation syndrome, he or she should go to the hospital and ask the doctor to treat the patient accordingly.