[The atrial complex of transbronchial ECG leads in the early diagnosis of cor pulmonale in patients with chronic nonspecific lung diseases. 2].

The atrial complex of ECG transbronchial leads (TB ECG) was in all cases recorded as two waves in line with right and left atrial contractions. Changes in atrial electrical activity reflect alterations in the lesser circulation. A new criterium of TB ECG atrial complex quantitation is suggested devised upon comparison of shifts in pulmonary artery pressure measured at Doppler echocardiography with TB ECG analysis. TB ECG registration allows recording of early sings of arising cor pulmonale in pulmonary disease patients.