| Most frequent causes of ARF type II | |
| Previous lung disease | Without pulmonary pathology |
| o COPD o Fever and sepsis o Asthma o COPD o Scoliosis | o Obesity: Main cause of hypoventilation in the western world o CNS tumors o Peripheral neuropathy o Guillain barré syndrome o Botulism o Miastenia gravis o Lateral sclerosis o Polymyositis o Muscular dystrophy o Rib fractures o Myxedema |