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Echocardiographic spectrum of hypertrophic cardiomyopathy
Insights
Echocardiography reliably detects hypertrophic cardiomyopathy (HCM) anatomical issues. This cardiac imaging technique identified previously unrecognized abnormalities, aiding in diagnosis and understanding of HCM.
Area of Science:
- Cardiology
- Medical Imaging
- Diagnostic Techniques
Background:
- Hypertrophic cardiomyopathy (HCM) is a complex cardiac condition.
- Accurate anatomical assessment is crucial for HCM diagnosis and management.
- Echocardiography is a primary non-invasive imaging modality for cardiac evaluation.
Purpose of the Study:
- To evaluate the efficacy of echocardiography in assessing anatomical abnormalities in hypertrophic cardiomyopathy.
- To compare echocardiographic findings with angiocardiographic and hemodynamic data.
- To identify novel echocardiographic patterns associated with hypertrophic cardiomyopathy.
Main Methods:
- Echocardiographic patterns were analyzed in 15 patients with hypertrophic cardiomyopathy.
- Findings were compared with data from 30 healthy individuals.
- Correlations were made with angiocardiographic and hemodynamic measurements.
Main Results:
- Echocardiography reliably identified key HCM abnormalities, including septal thickening and reduced ventricular dimensions.
- Abnormal mitral valve motion was observed, sometimes independently of left ventricular outflow tract obstruction.
- New findings included aortic regurgitation, mitral inflow tract obstruction, and abnormal mitral valve leaflet displacement.
Conclusions:
- Echocardiography is a valuable tool for assessing hypertrophic cardiomyopathy anatomy.
- The technique revealed previously unrecognized echocardiographic features of HCM.
- Asymmetric septal hypertrophy is not exclusive to hypertrophic cardiomyopathy.
Abstract:
Echocardiographic patterns in 15 patients with hypertrophic cardiomyopathy were compared with those in 30 healthy persons. Correlations with angiocardiographic data indicated that most of the anatomical abnormalities in hypertrophic cardiomyopathy can be assessed reliably by echocardiography. These include abnormal mitral valve motion, a reduction of the anteroposterior dimension of the left ventricular outflow tract and of the left and right ventricular cavities, increased thickness of the interventricular septum and the posterior left ventricular wall. Comparision of the haemodynamic and echocardiographic data showed that some degree of abnormal mitral valve motion during systole may occur in the absence of left ventricular outflow tract obstruction. On the other hand, it need not always be present with left ventricular outflow tract obstruction. Other, hitherto unrecognized, abnormalities in hypertrophic cardiomyopathy detected by this technique were: (1) Aortic valve regurgitation in three out of nine patients with evidence of left ventricular cutflow tract obstruction at cardiac catheterization. (2) Left ventricular inflow tract obstruction at the mitral valve level associated with gross septal hypertrophy (five cases). (3) Abnormal forward displacement of the posterior mitral valve leaflet and of the chordae tendineae during systole in 10 patients, in seven of whom there was confirmatory angiocardiographic evidence. Seven patients with miscellaneous cardiac disorders are described in whom asymmetric septal hypertrophy was revealed by echocardiography. In one of these patients coexisting hypertrophic cardiomyopathy was excluded histologically; thus asymmetrical septal hypertrophy is not confined to patients with hypertrophic cardiomyopathy.