Internal organ involvement in juvenile connective tissue disease.

Using noninvasive investigative techniques, cardiac, pulmonary and gastrointestinal abnormalities were found in patients with all types of connective tissue diseases. Impedance rheography suggested impaired myocardial function. Abnormalities of pulmonary function included a decrease in diffusing lung capacity for CO (DL) values followed by restrictive ventilatory defects and mild alveolar hyperventilation.