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Related Concept Videos

Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

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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...
378
Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

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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...
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Cardiomyopathy V: Interprofessional Care01:29

Cardiomyopathy V: Interprofessional Care

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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...
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Heart Failure II: Pathophysiology01:29

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Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
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Related Experiment Video

Updated: Jan 10, 2026

Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction
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Does Left Atrial Size and E/e' Predict Outcomes in Hypertrophic Cardiomyopathy?

Brandon Tillson1, Stephen Lord2, Christopher Eggett1,2

  • 1Faculty of Medical Sciences, Framlington Place, Newcastle University, England, UK.

Echocardiography (Mount Kisco, N.Y.)
|November 21, 2025
PubMed
Summary

Left atrial volume index (LAVi) better predicts atrial arrhythmia and interventions in hypertrophic cardiomyopathy (HCM) patients than left atrial diameter (LAD). Echocardiographic measures did not predict mortality in this study.

Keywords:
atrial fibrillationatrial fluttercardiomyopathycatheter ablationechocardiographyhypertrophicleft atrium

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Area of Science:

  • Cardiology
  • Cardiac Imaging
  • Hypertrophic Cardiomyopathy

Background:

  • Atrial arrhythmia is common and detrimental in hypertrophic cardiomyopathy (HCM) patients.
  • Catheter ablation (CA) has limited success in HCM, necessitating outcome predictors.
  • Left atrial size and E/e' are potential prognostic markers.

Purpose of the Study:

  • To assess if left atrial size (LAD, LAVi) and E/e' predict non-paroxysmal atrial arrhythmia, atrial interventions, and all-cause mortality in HCM.
  • To compare the predictive power of different left atrial size measurements.

Main Methods:

  • Retrospective analysis of 233 HCM patients from an echocardiography database.
  • Survival analysis for left atrial diameter (LAD), left atrial volume index (LAVi), and E/e' against endpoints.
  • ROC analysis to compare discriminative power of LAD and LAVi.

Main Results:

  • 31% prevalence of non-paroxysmal atrial arrhythmia over 8 years.
  • LAVi predicted non-paroxysmal atrial arrhythmia and atrial interventions; LAD predicted arrhythmia only.
  • LAVi showed superior discriminative power for atrial interventions; E/e' and echocardiographic variables did not predict mortality.

Conclusions:

  • Left atrial volume index (LAVi) may offer greater clinical utility than 2D measurements like LAD for predicting outcomes in HCM.
  • Further research is needed to determine optimal left atrial size measures for clinical practice.