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Results for “Heart Septal Defects”

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At least 19 recordsLinked to original sources
PubMed1976

Endocardial cushion defects: an anatomical study of 54 specimens.

An anatomical study of 54 specimens with endocardial cushion defect is described. The material was divided into two groups, according to the morphology and attachments of the anterior component of the anteroseptal mitral leaflet. We suggest that there is no divided or undivided anterior common leaflet. There are always two anterior leaflets, a mitral and a tricuspid one, separated by a commissure; depending on the degree of straddling of the mitral component over the interventricular septum, this will protrude into the interventricular septum or into the anterior papillary muscle of the right ventricle. Thus, the commissure separating the mitral and the tricuspid components will lie over the interventricular septum or will be quite separate in the right ventricle. In the latter case the straddling mitral component gives the false appearance of an undivided anterior common leaflet. The septal tricuspid leaflet was found to be underdeveloped or absent but we were not able to find any clefts or divisions in it. We suggest that this leaflet derives solely from the division of the posteroinferior endocardial cushion into two halves, right and left. The left half later becomes the posterior component of the normal anteroseptal mitral leaflet. Associated anamalies are also reviewed.

Ductus Arteriosus, Patent↗
PubMed1975

Evaluation of intracardiac shunts.

This article will review the qualitative and quantitative methods of radionuclide evaluation of intracardiac shunts. Radionuclide angiocardiography of the cardiopulmonary system has proven adequate, with few exceptions, for qualitative detection of left-to-right and right-to-left intracardiac shunts. Numerous authors have reported on the detection of intracardiac shunts using qualitative methods such as rapid sequential visualization of nuclide angiocardiography using the scintillation camera with Polaroid, 35mm or 70mm film. Recent development of videotape storage systems and computers offers a quantitative technique of permanently recording the nuclide angiocardiogram and thus the capability for replay and analysis of the study. Quantitative analysis of the nuclide angiogram in the form of heart chamber dilution curves or pulmonary dilution curves permits 1) determination of the presence or absence of left-to-right, right-to-left, or bi-directional intracardiac shunts, including shunts which might go undetected using the qualitative techniques, 2) shunt location at the atrial or ventricular level, 3) determination of the functional status of a corrective left-to-right shunt, and 4) shunt quantitation. By quantitative analysis of the isotope dilution curves, it is possible to calculate the size of left-to-right or right-to-left intracardiac shunts (Qp/Qs ratio) to within 10% of the values obtained at cardiac catheterization.

Adolescent↗