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ARTICLE |

THE DILATATION OF THE PULMONIC AREA OF THE HEART AND ITS SIGNIFICANCE

JAMES A. HONEIJ, M.D.
Arch Intern Med (Chic). 1923;31(6):866-870. doi:10.1001/archinte.1923.00110180087008.
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If the diagram representing the frontal view of the heart outlines, as shown on the fluoroscopic screen or by roentgenograms, is studied, several curves and depressions are noticed. The right side of the heart presents a single convex curve caused almost wholly by the auricle; the left side presents usually two curves, the superior curve caused by the aorta and the greater and inferior curve caused by the left ventricle. Between these two curves, situated usually between the second and third ribs, is a depressed line or concavity.

In this area, in abnormal conditions of the heart, the pulmonic artery and a portion of the auricle below it can sometimes cause two smaller curves instead of the normal depression. Or, frequently, a single marked curve is noticeable, so that the left side of the heart may show three noticeable curves instead of two. This third curve, if it covers the

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The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
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