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.
1 Symptoms of blood clotting problems, usually severe or sudden, such as: 2  headache or migraine. 3  loss of or change in speech, coordination, or vision. 4  numbness of or pain in chest, arm, or leg.  unexplained shortness of breath.