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.
*** evidence that the risk of DVT in most long-distance travel is extremely low, and for most people, not worth any other intervention other than moving around periodically.***
Except for some people--- read more at:
http://www.kevinmd.com/blog/2012/02/antithrombotic-guidelines.html