02-27-2014, 09:02 AM
A 63 y/o male with recent hx of MI presents to the ER cz of increasing shortness of breath and cough. Physical examination reveals crackles at the lung bases bilaterally and and an S3 on cardiac auscultation. His O2 saturation is low. Which of the following most likely accounts for this pt's dyspnea?
A-Increased FRC
B-High V/Q ratio at apices of the lungs
C-Decreased alveolar surface tension
D-Decreased lung compliance
E-Lt to Rt cardiac shunting
A-Increased FRC
B-High V/Q ratio at apices of the lungs
C-Decreased alveolar surface tension
D-Decreased lung compliance
E-Lt to Rt cardiac shunting
