Related Experiment Video

Updated: May 18, 2026

Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography
07:11

Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography

Published on: October 28, 2020

The diagnosis of left ventricular outflow tract obstruction in hypertrophic cardiomyopathy

Beatriz Piva e Mattos1, Marco Antonio Rodrigues Torres, Taiane Francieli Rebelatto

  • 1Serviço de Cardiologia, Hospital de Clínicas de Porto Alegre, Brazil. bpmattos@cardiol.br

Arquivos Brasileiros De Cardiologia
|September 6, 2012
PubMed

Insights

Hypertrophic cardiomyopathy, a genetic heart disease, involves left ventricular hypertrophy and outflow tract obstruction. Exercise echocardiograms reveal latent obstruction, crucial for diagnosing and managing this condition.

Area of Science:

  • Cardiology
  • Genetics
  • Medical Imaging

Background:

  • Hypertrophic cardiomyopathy (HCM) is a common genetic heart disease.
  • It causes left ventricular hypertrophy and dynamic outflow tract obstruction.
  • Obstruction arises from complex interactions involving the mitral valve, septum, and ventricular geometry.

Purpose of the Study:

  • To highlight the significance of exercise echocardiography in diagnosing HCM.
  • To emphasize the role of imaging in understanding obstruction mechanisms.
  • To improve diagnosis and management of obstructive and latent obstructive HCM.

Main Methods:

  • Utilizing ultrasound imaging (echocardiography) and Magnetic Resonance Imaging (MRI).
  • Assessing left ventricular outflow tract (LVOT) gradients at rest and during exercise.
  • Evaluating mitral valve function and associated structural abnormalities.

Main Results:

  • Resting subaortic gradients are present in 30% of HCM cases.
  • Exercise echocardiography unmasks latent obstruction in 60-75% of initially non-obstructive forms.
  • Imaging methods identify mechanisms of ventricular obstruction.

Conclusions:

  • Exercise-induced gradients are critical for diagnosing HCM, even with minimal resting obstruction.
  • Integrated imaging approaches (ultrasound, MRI) are essential for comprehensive evaluation.
  • Accurate diagnosis facilitates effective management of obstructive and latent obstructive HCM.

More Related Videos

Chronic Thromboembolic Pulmonary Hypertension and Assessment of Right Ventricular Function in the Piglet09:22

Chronic Thromboembolic Pulmonary Hypertension and Assessment of Right Ventricular Function in the Piglet

Published on: November 4, 2015

Assessment of Right Ventricular Structure and Function in Mouse Model of Pulmonary Artery Constriction by Transthoracic Echocardiography10:33

Assessment of Right Ventricular Structure and Function in Mouse Model of Pulmonary Artery Constriction by Transthoracic Echocardiography

Published on: February 3, 2014

Related Concept Videos

Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
Mitral Stenosis II: Clinical features and Diagnostic Tests01:23

Mitral Stenosis II: Clinical features and Diagnostic Tests

Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
Cardiomyopathy VII: Pre and Post Operative Nursing Management01:28

Cardiomyopathy VII: Pre and Post Operative Nursing Management

Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...
Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
Cardiomyopathy V: Interprofessional Care01:29

Cardiomyopathy V: Interprofessional Care

Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...