The arrow was a weapon in their culture, it was used to hunt and provide for their families as well as offer protection, and because of this it was a tool for sustaining life. One of the biggest factors in altering the meaning, is the way the arrow is depicted or placed in the tattoo design.
1 Symptoms of blood clots in the lung (pulmonary embolus) are chest pain, shortness of breath, and rapid pulse and breathing.  Symptoms of a stroke (blood clot in an artery of the brain) include loss of speech, vision, and weakness on one side of the body.
Swelling in one or both legs are symptoms of a blood clot. Swelling that is a symptom of a blood clot in the leg can be sudden or chronic. A blood clot in the leg might produce no symptoms at all unless the clot dislodges and travels to another part of the body and blocks blood flow.