Evaluation of cardiac size in chronic bronchitis and pulmonary emphysema.

The accuracy of interobserver variability of roentgenographic analysis for cardiac size in patients dying with chronic bronchitis and pulmonary emphysema were correlated with pathologic data derived from special studies. Three trained observers were able to accurately and consistently diagnose chronic bronchitis and pulmonary emphysema and to detect cardiomegaly on the chest x-ray film. The best criteria for chronic bronchitis and pulmonary emphysema were those of overinflation; however, none of the roentgenographic criteria usually suggested for the specific diagnosis of right ventricular or left ventricular hypertrophy were found to be reliable. The inaccuracy and interobserver variability in the detection of enlargement of specific chambers make it evident that the usual criteria are not valid and that roentgenographic appraisal of cardiac size in these patients in limited to findings of normalcy or cardiomegaly.

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