Sinus rhythm　WPW syndrome　Delta waves by accessory pathway location　Premature ventricular contractions
Tachycardia in WPW syndrome (AVRT)　　AV nodal reentrant tachycardia (AVNRT)　　Intra-atrial reentrant tachycardia (IART) / atrial flutter (AFL)　Download

WPW syndrome with a right-sided pathway (large delta wave) and with a left-sided pathway (small delta wave)