What is purple toes syndrome?

I just happen to read the "serious side effects of COUMADIN also include" with my latest refill of 5 mg Warfarin and see:  Purple toes syndrome..call you healthcare provider right away if you have pain in your toes and they look purple in color or dark in color.

As it turns out I had an unexplained bruise-like area on my left foot behind three toes.  I figured it may be due to some hit I had suffered, but one too light to notice, but perhaps my clotting was too low and I got a bruise.  I reduced my Warfarin for a couple of nights and then got my pro-time taken and found my clotting was in range, The bruising went away.

Given the warning on the medication guide I wonder if I had a serious problem and should have, or should yet, tell my doctor about the (now gone) bruise.  What could be so serious about a bruise that would require immediate medical evaluation?  I did not have any pain.

What is purple toes syndrome?

[twinbee]

I don't know what it really is, but whenever I see my EP she always checks my feet and tells me to watch for "purple" toes.