For doctors · ECG quiz

Differentiating FVP from WPW

A PDF of ECGs from more than 60 cases for practicing the differential diagnosis of WPW syndrome and FVP. Related materials such as slides and papers can also be downloaded. The materials are in Japanese, but the ECGs speak for themselves.

Updated 2026.10.5

Resources

How to use the quiz

  • Each case is an ECG on one page followed by the answer on the next.
  • The later cases are difficult. However many times I try, I can't get them all right either.

Still, if you go through to the end, I think you will get a feel for the difference between WPW and FVP.

Key point

The key point is whether R is taller than S in leads V1 and V2.

Tests for a definite diagnosis

  • WPW: Holter monitoring is useful for diagnosing WPW.
  • FVP: the ATP test is the definitive way to diagnose FVP.
  • I think it is difficult to confirm FVP by Holter monitoring.