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ESSENTIALS OF ECHOCARDIOGRAPHY #4 - Echo in Context

ESSENTIALS OF ECHOCARDIOGRAPHY #4 - Echo in Context

ESSENTIALS OF ECHOCARDIOGRAPHY #4 - Echo in

ESSENTIALS OF ECHOCARDIOGRAPHY #4Congenital Heart DiseaseJoseph A. Kisslo, MDDavidB.Adams,RDCSGraham J. Leech, MAThe Use of Echocardiography in Congenital Heart DiseaseTwo-dimensional echocardiography is ideally suited for the evaluation of congenital heartdisease because of its ability to visualize cross-sections of complex cardiac anatomic structures.Visualizing heart walls, chambers, and valves, it is, in many ways, superior to angiography forrevealing complex spatial morphologic information.This unit discusses the use of two-dimensional echocardiography in the evaluation of congenitalheart disease. It must be realized that currently, conventional Doppler methods and Dopplercolor flow imaging have added even more diagnostic power to cardiac ultrasound for evaluationof congenital heart disease. For many seemingly simple and some complex disorders, cardiaccatheterization is no longer necessary when data can be reliably obtained by echo and Dopplermethods. M-mode echocardiography has been almost totally supplanted by these newermodalities.The purpose of this unit is to provide a basic understanding of congenital heart disease and howechocardiography is helpful in establishing diagnoses. As such, its aim is principally towardthose with little background in this area. Not all disease entities can be covered and only themore common disorders will be described. Little discussion of patient management is possible.All congenital heart disease is potentially complex. Such a statement should not be frighteningas it only reflects the fact that the presence of one lesion increases the possibility for another.Multiple lesions are possible. For example, transposition of the great vessels may exist with orwithout ventricular septal defects or with or without right ventricular outflow tract obstruction.In addition, just like in adult acquired disease, congenital heart disorders represent a spectrum.There can be mild, moderate, or severe expressions of any disorder.Views for Congenital Heart DiseaseAs with acquired heart disease, the standard apical, parasternal, and subcostal views are used forthe majority of recordings. In addition, emphasis is placed on certain views that are particularlyrewarding. For example, the subcostal approaches (Fig. 1) identify the interatrial septum and therelationships of the atrial and ventricular septum to the atrioventricular valves. Suprasternalviews are good for examination of the great vessels and the aortic arch. All views obviouslymust be utilized. In small children, lack of attenuation from the rib cage permits routine imagingwith high frequency transducers such as 5MHz or higher.

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