…adults over 40 years of age, atherosclerosis is the predominant cause. Other mechanisms include thrombosis, embolism, vasculitis, fibromuscular dysplasia, arterial entrapment, cystic adventitial disease and…

…particular care in: A risk of hypercapnic respiratory failure — COPD, severe obesity with hypoventilation, neuromuscular disease, marked chest wall deformity, severe bronchiectasis and cystic fibrosis…