trees SMALL HEART LARGE LUNGS – EMPHYSEMAThe P-A view of the chest shows hyperinflated lung volumes. Note that more than 10 posterior ribs can be visualized. The lateral view of the chest shows hyperinflated lung volumes in this patient with acute asthma, characterized by flattening of the hemidiaphragms and increased aeration of the retrosternal air space.Courtesy of Ashley Davidoff M.D41987cKey words emphysema medical studentssmall heartlarge lungshyperinflated lungKeywords:emphysema enlarged hyperinflated lung