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Published on: October 28, 2020
Exploring Morphologic and Functional Variants in Hypertrophic Cardiomyopathy: An Echocardiographic and Doppler Review
Kamil Stankowski1, Fabrizio Celeste1, Manuela Muratori1
1Department of Perioperative Cardiology and Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Via C. Parea 4, 20138 Milan, Italy.
Insights
Echocardiography is key for diagnosing and monitoring hypertrophic cardiomyopathy (HCM). This review details assessing diverse HCM phenotypes and related anatomical variations using echocardiography for accurate diagnosis and management.
Area of Science:
- Cardiology
- Medical Imaging
- Genetics
Background:
- Hypertrophic cardiomyopathy (HCM) is a myocardial disorder with varied presentations.
- Echocardiography is the primary diagnostic tool for HCM.
- Understanding HCM phenotypes is crucial for effective management.
Purpose of the Study:
- To review echocardiographic assessment of diverse HCM morphologic phenotypes.
- To highlight diagnostic nuances and imaging challenges in HCM.
- To examine anatomical variants contributing to HCM phenotypes and obstruction.
Main Methods:
- Focused review of echocardiographic assessment techniques for HCM.
- Analysis of distinct HCM phenotypes (e.g., asymmetric septal, concentric, apical).
- Evaluation of left ventricular apical aneurysm flow, intraventricular gradients, and mitral valve anatomy.
Main Results:
- Echocardiography effectively identifies various HCM phenotypes.
- Specific techniques are essential for assessing dynamic gradients and flow patterns.
- Mitral valve anatomy and variants significantly influence obstruction and HCM expression.
Conclusions:
- Comprehensive echocardiography is vital for diagnosing and stratifying HCM.
- Recognizing diverse phenotypes and anatomical variants improves diagnostic accuracy.
- Echocardiography guides longitudinal monitoring and risk stratification in HCM patients.
Abstract:
Hypertrophic cardiomyopathy (HCM) is a complex and heterogeneous myocardial disorder, best evaluated with echocardiography for initial diagnosis, risk stratification, and longitudinal monitoring. This focused review explores the echocardiographic assessment of various morphologic phenotypes of HCM, emphasizing their diagnostic nuances. Distinct phenotypes, including asymmetric septal hypertrophy, concentric hypertrophy, and the less common apical HCM, present unique imaging challenges. Additionally, the review outlines essential techniques and practical tips for assessing left ventricular apical aneurysm flow patterns and dynamic intraventricular gradients. A thorough understanding of mitral valve anatomy and its role in left ventricular outflow tract obstruction is also crucial. Finally, anatomical variants of the mitral valve, papillary muscles and left ventricular myocardium are examined for their contribution to systolic anterior motion and mid-ventricular obstruction as well as for constituting additional phenotypical expressions of HCM, beyond left ventricular hypertrophy.
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