Abnormal ECGs?

I’m curious if anyone else has had an abnormal ECG? I was just recently diagnosed with Wolff-Parkinson-Smith syndrome. It’s just weird to me that when checking my heart in the past - no other doctor detected this.

Aaron702 was diagnosed with mitral valve prolapse:
viewtopic.php?f=3&t=989&p=68368#p68368

My ecg came back abnormal today. Not sure what to make of it in relation to Propecia?