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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes A Large Blood Clot In The Left Leg ?

I had a blood clot in my lung 2 years ago, and a large one at that. They still don t know why or how it happened. Now I have one large deep in my lower left leg and they are removing it through the groin , before they do the procedure, they are doing a scan on my heart. I had heard a blood clot from the leg can end up in a lung. But not the other way around. So just curious if you have any information about it.
Fri, 3 Feb 2017
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Cardiologist,  's  Response
hello,
Both ways possible, however if you don't have any heart dysfunction then less likely to occur from heart to legs. The more common one is from legs to heart and lungs. This occurs due to prolonged immobilisation, trauma to legs, serious illness or operation leading to bed ridden condition, or sometimes due to thickening of blood. This clot then moves from legs to heart and lungs causing problems. You need to be put blood thinners which will dissolve your clots. Surgery may be done to remove it.
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What Causes A Large Blood Clot In The Left Leg ?

hello, Both ways possible, however if you don t have any heart dysfunction then less likely to occur from heart to legs. The more common one is from legs to heart and lungs. This occurs due to prolonged immobilisation, trauma to legs, serious illness or operation leading to bed ridden condition, or sometimes due to thickening of blood. This clot then moves from legs to heart and lungs causing problems. You need to be put blood thinners which will dissolve your clots. Surgery may be done to remove it.