Spontaneous interstitial emphysema of the lung simulating organic heart disease

1. 1. A case of spontaneous interstitial emphysema of the lung is presented and the probable mechanism is discussed. 2. 2. Constitutional symptoms are minimal as a rule, but they vary with the amount of escaped air, as does the duration of the objective findings. 3. 3. Serial roentgenograms are a definite aid in establishing the diagnosis. 4. 4. Organic heart disease is simulated frequently and serial electrocardiograms are in order. 5. 5. Pneumothorax, especially on the left, is a frequent complication. 6. 6. Prognosis is excellent in the majority of cases, except in infancy.