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Article
August 1944

DISEASE OF THE MITRAL VALVE: ITS EFFECT ON THE PATTERN OF THE ELECTROCARDIOGRAM

Arch Intern Med (Chic). 1944;74(2):94-99. doi:10.1001/archinte.1944.00210200015002
Abstract

Enlargement of the left auricle of the heart due to rheumatic mitral stenosis is a well recognized occurrence. Numerous reports indicate that extreme dilatation is not uncommon,1 while lesser degrees of enlargement are regularly observed either roentgenologically2 or at the autopsy table.3 Auricular hypertrophy may also be reflected in the electrocardiogram. Einthoven4 was the first to point out the significance of the auricular complex. Its frequent distortion in mitral stenosis has been noted for a generation.5

In recent years the work of Master and others6 has again brought into prominence the possible value of electrocardiographic changes in confirming the clinical diagnosis of disease of the mitral valve. It is the purpose of the present communication to evaluate the electrocardiographic changes commonly recognized in disease of the mitral valve with particular reference to such diagnostic value as they may possess. This study is particularly pertinent inasmuch as universally

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