Asymptomatic Evaluation of WPW

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  1. RR less than 250 ms
  2. Intermittent preexcitation on EKG at similiar heart rates. Use holter with good delta
  3. Disappearance of delta during GXT
  4. Disappearance of delta with less than Procainamide 500mg means AP refractory exceeds 270ms.
  5. AP refractory period less than 270 ms
  6. Look for memory T waves on holter with loss of delta
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