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[Clinical aspects and diagnostic criteria in non-obstructive symmetric hypertrophic myocardiopathy]
Insights
Non-obstructive symmetric hypertrophic cardiomyopathy (NOSHCM) involves septal and posterior wall thickening without outflow obstruction. This condition differs from obstructive forms, showing reduced posterior wall movement and fewer outflow obstruction signs.
Area of Science:
- Cardiology
- Medical Imaging
- Clinical Medicine
Context:
- Hypertrophic cardiomyopathy (HCM) is a complex cardiac condition.
- Distinguishing between obstructive and non-obstructive HCM is crucial for patient management.
- Non-obstructive symmetric hypertrophic cardiomyopathy (NOSHCM) presents unique diagnostic challenges.
Purpose:
- To detail the clinical, electrocardiographic, and imaging characteristics of NOSHCM.
- To differentiate NOSHCM from asymmetric hypertrophic obstructive cardiomyopathy (AHOCM).
- To discuss the classification and therapeutic strategies for NOSHCM.
Summary:
- This study analyzed 21 patients diagnosed with NOSHCM based on echocardiographic and/or left ventriculographic evidence of septal and posterior wall hypertrophy without left ventricular outflow obstruction (LVOTO).
- Key findings indicate reduced posterior wall excursion in NOSHCM compared to AHOCM.
- Patients with AHOCM more frequently exhibit systolic murmurs and carotid pulse changes indicative of LVOTO.
Impact:
- Provides a comprehensive description of NOSHCM for improved diagnostic accuracy.
- Highlights key differentiating features between NOSHCM and AHOCM.
- Informs clinical decision-making regarding the classification and treatment of patients with symmetric hypertrophic cardiomyopathy.
Abstract:
We describe the clinical data, the standard and Holter electrocardiographic observations, the carotid pulse tracings, the M-mode and B-mode echocardiographic findings and the left ventriculographic aspects of 21 patients with non-obstructive symmetric hypertrophic cardiomyopathy (NOSHCM). NOSHCM was diagnosed when there was echocardiographic and/or left ventriculographic evidence of septal and posterior wall hypertrophy without signs of left ventricular outflow destruction (LVOTO). Compared to the asymmetric hypertrophic obstructive cardiomyopathy (AHOCM), NOSHCM reveals reduced excursion of the posterior wall of the left ventricle, whereas patients with AHOCM have more frequently systolic murmurs and carotid pulse changes suggestive of LVOTO. Proper classification and treatment of NOSHCM are discussed.