Reliability of Vectorcardiography in Assessing the Severity of Congenital Aortic Stenosis

CONGENITAL AORTIC STENOSIS is a potentially serious heart defect which may require surgical correction even in asymptomatic children. The assessment of its severity consists of two steps: the clinical evaluation and cardiac catheterization. The latter may represent a major surgical procedure. Many investigators have been tempted to use clinical criteria and simpler laboratory procedures, particularly electrocardiography, to select patients for physiological studies. In spite of the fact that some relationships have been demonstrated between the various simple clinical tests and the severity of aortic stenosis, accurate assessment of the severity has not been possible without cardiac catheterization. Recently, it has been suggested that certain vectorcardiographic measurements permit a reasonable assessment of the severity of aortic stenosis.1' 2 The purpose of this communication is to report the findings of a study designed to test the accuracy of this method in assessing the severity of congenital valvular aortic stenosis.

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