Why the study?
What is the utility of two-dimensional echocardiography in the diagnosis of hypertrophic cardiomyopathy?
What is the utility of two-dimensional echocardiography in the diagnosis of hypertrophic cardiomyopathy?
Two-dimensional echocardiography is valuable for assessing anatomical and functional features of hypertrophic cardiomyopathy, but definitive diagnosis requires specific findings like cardiac hypertrophy with SAM involving the mitral valve body.
Echo should not alone confirm definitive HCM diagnosis absent hypertrophy plus mitral SAM; leaves open refined multimodal criteria in research.
Various anatomical and functional features of hypertrophic cardiomyopathy are analyzed in view of the data provided by two-dimensional echocardiography. Measurement of septal thickness is crucial, and is best done by a combination of M-Mode and 2-D echo. Two types of systolic anterior movement of the mitral valve (SAM) are observed and are related to the degree of subvalvular gradient. The specificity of these patterns of SAM is analyzed. The functional anatomy of the mitral valve in relation to the presence and degree of mitral regurgitation shows that although the presence and type of SAM are important, there are other causes of mitral regurgitation in hypertrophic cardiomyopathy unrelated to SAM. We emphasize the fact the 2-D echo cannot "diagnose" hypertrophic cardiomyopathy except when cardiac hypertrophy plus SAM involving the body of the mitral valve is seen; in the remaining cases, 2-D echo confirms/suggests the clinical diagnosis.
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Ballester et al. (1984) studied this question.
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