<prompt> What is false about emphysema?Decreased FEV1Decreased timed vital capacityIncreased residual volumeIncreased diffusion capacity  <response>: Increased diffusion capacity is seen in: Acute congestive hea failure Polycythemia Pulmonary hemorrhage good pasture syndrome Asthma Decreased diffusion capacity is seen in: Pulmonary fibrosis Emphysema Pulmonary hypeension 