Abstract：Pre-excitation syndrome is an electrocardiographic pattern in which all or part of the ventricular muscles can be activated sooner than normal due to atrial activation by accessory pathway. The existence of the bundle of Kent contributes to formation of the classic preexcitation syndrome (the socalled Wolff Parkinson White syndrome, WPW syndrome), with an incidence rate of about 0.1‰-0.3‰ and 7%-20% of these patients are complicated with other congenital heart diseases(such as Ebstein’s anomaly). WPW syndrome can be categoried by manifest pre-excitation, intermittent pre-excitation, incomplete latent pre-excitation, latent pre-excitation and concealed pre-excitation. Tachyarrhythmia related to WPW syndrome includes atrioventricular reentrant tachycardia and atrial ectopic activation down the ventricle through accessory pathway.The existence of pre-excitation could probably make it harder for ECG diagnosis of some diseases. For example, pre-excitation is always exactly like or conceals myocardial infarction or bundle branch block and so on. Therefore, elimination of δ wave could help in differential diagnosis.Generally, pre-excitation syndrome has a good prognosis and radiofrequency ablation has become a preferred treatment.
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2013, Vol. 22 
