Normally, one-way valves in the veins keep blood flowing up toward the heart.
But a blood clot can form around a valve in a vein.
If red blood cells become trapped around a valve, a blood clot might form. This blood clot can stop the flow of blood in that vein.
|Primary Medical Reviewer||E. Gregory Thompson, MD - Internal Medicine|
|Specialist Medical Reviewer||Jeffrey S. Ginsberg, MD - Hematology|
|Last Revised||December 28, 2011|