[Verified Answer]: Your patient works as a professional…

Your patient works as a professional painter and has recently finished a multi unit condominium job, painting walls as high as 24 feet. She complains of dull, aching, throbbing diffuse left arm pain with occasional discoloration of her fingers. She is concerned about cardiac involvement, but the NP notes normal vital signs, cardiac examination, EKG, cardiac enzymes. The most likely diagnosis is: