Evaluation of Routine Serial Fluoroscopic Examinations of the Heart in the Postero-anterior and Oblique Views at Specific Degrees of Rotation
With Special Reference to the Angle of Clearance of the Left Ventricle
An evaluation of 2973 serial fluoroscopic examinations at specific degrees of rotation for 500 subjects 2 to 21 years of age, made by 35 different observers with an average of five examiners per patient, is presented. In the postero-anterior view, 1 per cent showed convexity of the pulmonary segment. In the right anterior oblique position 1 per cent showed retrodisplacement of the esophagus. The angle of clearance of the left ventricle in the left anterior oblique position was less than 55 degrees in 99 per cent of the fluoroscopic examinations. In addition, 1393 routine serial fluoroscopic examinations of 100 patients with inactive rheumatic heart disease, 4 to 48 years of age, were analyzed. There was a total of 49 observers, an average of 8 per patient. The angle of clearance of the left ventricle ranged between 55 and 70 degrees. There was left auricular enlargement in 98 patients. It is concluded that fluoroscopic examination at specific degrees of rotation is a reliable procedure for detecting cardiac chamber abnormality, and should be included as part of the routine examination.
- © 1953 American Heart Association, Inc.