Thanks for linking that study. I'll take a look.Morning
The authors argue that for every 10 000 patients with mechanical heart valves who are given perioperative intravenous heparin, three thromboembolic events are prevented at the cost of 300 major postoperative bleeding episodes. (ref Kearon C, Hirsh J. Management of anticoagulation before and after elective surgery. N Engl J Med 1997;336:1506-11.)
seems to be supported by various other evidence too
PS: I just fixed the ref from the NPS.ORG reference to point to the right place
To add a little more to the comments from my cardiologist, he also said that for mechanical in the aortic position, which mine is, risk of stroke from holding warfarin for a couple of days is extremely low- more risk involved if it is the mitral position.