title: Correlation between the duration of the cardiac cycle and the complex of impedance plethysmographic hemodynamic indices of the lung and aorta.
abstract: Rheographic studies of the lung and aorta have been performed on 20 patients with atrial fibrillation and on 30 normal individuals before and after Valsalva's manoever. The findings disclose a strongly expressed positive correlation between the duration of the cardiac cycle and the rheographic systolic index, a Vmax., a Vm and a negative correlation with the Q-a interval and the ab/RR of the lung and the aorta.
mesh_terms: D000368:Aged; D001013:Aorta, Thoracic / Q000503:physiopathology*; D001281:Atrial Fibrillation / Q000175:diagnosis / Q000503:physiopathology; D002302:Cardiac Output; D003327:Coronary Disease / Q000175:diagnosis / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D010992:Plethysmography, Impedance; D011652:Pulmonary Circulation; D012214:Rheumatic Heart Disease / Q000175:diagnosis / Q000503:physiopathology; D013997:Time Factors; D014636:Valsalva Maneuver