thirty-seven patients with dyspnea , clinical chronic obstructive pulmonary disease and abnormal pulmonary function tests demonstrating an obstructive airways pattern underwent six-foot posteroanterior chest radiography , radionuclide ventriculography and sphygmomanometer-monitored arterial pressure response during a bedside valsalva maneuver .
C0024117
chronic obstructive pulmonary
C0817096
chest