Pulmonary Embolism Support Group
By far the most common form of pulmonary embolism is a thromboembolism, which occurs when a blood clot, generally a venous thrombus, becomes dislodged from its site of formation and embolizes to the arterial blood supply of one of the lungs. Symptoms may include difficulty breathing, pain during breathing, and more rarely circulatory instability and death.
Lupus Anticoagulant can be negative when the patient is on heparin. Also, it has been known to give a false negative when on Coumadin. This is dependent on which test kit the physician uses.
Here is an article regarding what thrombophilia's to test for by my organization:
http://clotconnect.wordpress.com/2010/11/19/thrombophilia-testing-%e2%80%93-who-should-be-tested/
Here is also an article by the same doctor found on the fvleiden.org website:
http://fvleiden.org/ask/49.html
Regards,
Tom
Lots of people also have one mutated gene and some, like Tom and I, have both mutated genes, so we're at greater risk of clotting. Make sure to find out from your hematologist if it's FVL, do you have ONE or TWO mutated genes (called heterozygous for 1 bum gene or homozygous for 2 bum genes). Because that can be a factor in your treatment going forward.
I've had three clotting episodes and two complete rounds of tests with a hemo. So far, I'm negative for everything. Maybe someday, they'll discover something new ad then they can test me for that. I dunno.