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.
Your risk of a blood clot can also be increased if you smoke or are overweight. Symptoms of having a blood clot include skin redness, swelling in only one leg, swelling or bruising behind the knee, localized soreness or pain, or having a warm spot on your leg. If the clot moves to the lungs you may experience shortness of breath, chest pains, a fast heartbeat, mild fever, or fainting spells.