Which of the following is markedly decreased in restrictive lung disease: (A) FVC, (B) FEV1, (C) FEV1/FVC, (D) RW
Answer is A. In restrictive lung diseases,lung volumes are markedly reduced,like TLC,FRC,RV,as well as FVC.FEV1 is also reduced compared with normal values,but is relatively a greater value compared with lung volumes.As a result,FEV1/FVC ratio will be normal or increased in restrictive lung diseases. Reference :Harrison's medicine-18th edition,page no:2093.