Home » QAWhy Is Alveolar Ventilation Less Than Pulmonary Ventilation?ContentsWhat causes decreased ventilation?What does alveolar ventilation mean?What are Hypoventilatory changes?What is contributing to the decreased alveolar ventilation?What causes decreased ventilation?.What does alveolar ventilation mean?What are Hypoventilatory changes?What is contributing to the decreased alveolar ventilation?