Electrocardiographic changes in induced bronchial asthma.
نویسندگان
چکیده
Asthmatic attacks were induced in 11 patients by the inhalation of the antigenic extracts. The electrocardiograms were recorded before, during and after the attacks for comparison. The significant changes during the asthmatic attack were as follows: (1) taller and more peaked P-waves in leads II, III and aVF, and the shifting of the mean vector of P-waves on the frontal plane towards the right; (2) generalized low amplitude of QRS-complexes, especially marked in left precordial leads and shifting of the mean vactor of QRScomplexes on the frontal plane towards the right; (3) respiratory changes of QRS-complex which showed lower during the inspiratory phase and taller amplitude during the expiratory phase; (4) clockwise rotation of the heart along the longitudinal axis. Above findings were found in all cases and could be explained by the hyperinflation of the lung and strain of the right side of the heart by an increased pulmonary artery pressure, which were observed during cardiac catheterization.
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ورودعنوان ژورنال:
- Japanese heart journal
دوره 2 شماره
صفحات -
تاریخ انتشار 1961