I had a DVT 7 years ago with a pulmony embolism (painful). Usual treatment - a week on heparin followed by warfarin - in my case for 6 months. Got back to running marathons without too much trouble but had another DVT in April, so I'm now on warfarin for life. Again I'm getting back to running without any real problems apart from the lost training (I'm 63 so recovery takes longer these days). However, I may have been lucky. My research on the net and talking to other victims sugests that there is very little useful advice to be had thet improves on your own "start again tentatively and listen to my body".
The problem appears to be that individuals respond very differently to clots and any damage done is difficult for doctors to assess. There are no established, scientifically-based guidelines. In fact I've been quite depressed by the limited knowledge about DVT and it's consequences generally available.The use of warfarin itself is relatively new and not well researched although it is generally agreed that it does work. (One aspect of the problem is that warfarin/heparin do not themselves disolve existing clots - they prevent further clotting, leaving the body to deal with existing clots which either dissolve or become attached and safely bypassed.)
For athletes the following links may be interesting: http://freybird.blogspot.com/2009/01/deep-vein-thrombosis-for-cyclist.html and http://www.accessmylibrary.com/coms2/summary_0286-30275682_ITM
Finally, I am personnally convinced about the need for athletes to use compression socks to help prevent future complications. I have been prescribed class 2 calf length stockings which I wear most of the time. I run in class 1 compression socks (several brands on the market, c. £10) - look at Paula Ratcliffe or Mark Cavendish.
Hope all goes well for you.
