WOLFF PARKINSON WHITE SYNDROME
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  • "Delta wave" (slurred positive or negative initial deflection of QRS complex)
  • Fusion QRS (early activation of ventricle via Kent bundle gives delta wave; later activation via His bundle gives remainder of QRS)
  • Short PR (actually P-delta) interval
  • Not all leads will show a short PR and delta wave

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  • Premature atrial contraction
  • Premature ventricular contraction