Are vascular conditions a common complication of lung disease?

Yes for some lung dz. Any condition that causes pulmonary hypertension (emphysema/copd, sleep apnea, fibrosis, scleroderma, etc) can lead to cor pulmonale (right-heart failure) which stagnates venous flow and cause liver problems. Cancer or infection of the lung can sometimes lead to dic, a life-threatening condition in which clots block small blood vessels all over the body.
Lungs and vessels. Since smoking is the most common cause of lung disease and smoking causes vascular disease, it is not uncommon for people with lung disease to also have vascular disease. Vasculitis is disease of the blood vessels that can affect the lungs. Not all lung diseases cause vascular disease.