Hello Thanks for writing to HCM Persistent coarsened interstitial lung markings with moderate bronchovascular congestion may be due to inflammation,infection like bronchitis,age related,early heart failure etc. You need clinical correlation and only require conservative treatment.You may need antibiotics,steroids depending upon findings. You should consult your doctor and avoid dust and smoke. No active pneumonia is noted. No pleural effusion is seen. The heart size is also normal. Get well soon. Hope I have answered your question. Take Care Dr.Indu Bhushan