heavy ex smoker with enlarged right hilar node

I was a long time smoker, 13 to 45, the last 4 years were 3 packs a day. I was recently diagnosed with moderate emphysema in both upper lobes, the CT scan that showed the emphysema, also showed an enlarged right hilar node, 1.5cm. by 1.6 cm. some of my labs were off, WBC 11.5 1000/mm3, Hgb 11.7 gm/dl, MPV 8.7fl, gran abs 8.11, Albumin 3.1 gm/dl, D-Dimer .65 mg/L FEU.
The day I found these out I was admitted to hospital with tachycardia, because I have a history of heart attacks.  They did a CT to rule out heart muscle damage and found the emphysema and enlarged hilar node. How common is an enlarged non cancerous hilar node? and given my history, should they do a biopsy?