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Related Concept Videos

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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Aortic Regurgitation III: Medical Management01:25

Aortic Regurgitation III: Medical Management

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Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
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Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

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IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...
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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

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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...
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Mitral Stenosis I: Introduction01:22

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Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Measuring Ascending Aortic Stiffness In Vivo in Mice Using Ultrasound
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Relations Between Aortic Stiffness and Left Ventricular Mechanical Function in the Community.

Vanessa Bell1, Elizabeth L McCabe2, Martin G Larson2,3

  • 1Cardiovascular Engineering, Inc., Norwood, MA.

Journal of the American Heart Association
|January 11, 2017
PubMed
Summary
This summary is machine-generated.

Increased aortic stiffness is linked to poorer cardiac function, specifically reduced global longitudinal strain (GLS). This association was stronger in women, highlighting sex differences in cardiovascular health.

Keywords:
aortic stiffnesscharacteristic impedanceglobal longitudinal strainleft ventricle functionpulse wave velocityventricular/vascular coupling hemodynamics

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Area of Science:

  • Cardiovascular Physiology
  • Biomedical Engineering
  • Clinical Cardiology

Background:

  • Aortic stiffness negatively impacts ventricular-vascular coupling and left ventricular systolic function.
  • Global longitudinal strain (GLS) is a sensitive indicator of early cardiac dysfunction.
  • Understanding the relationship between aortic stiffness and GLS is crucial for early detection of cardiovascular issues.

Purpose of the Study:

  • To investigate the association between aortic stiffness and GLS in a large, community-based cohort.
  • To explore potential sex differences in the relationship between aortic stiffness and GLS.

Main Methods:

  • Utilized data from 2495 participants (age 39-90 years, 57% women) from the Framingham Offspring and Omni cohorts.
  • Measured arterial hemodynamics using tonometry and cardiac function via echocardiography.
  • Assessed aortic stiffness through carotid-femoral pulse wave velocity and characteristic impedance; calculated GLS using speckle tracking.

Main Results:

  • Increased carotid-femoral pulse wave velocity and characteristic impedance were significantly associated with worse GLS.
  • These associations remained significant after multivariable adjustments for cardiovascular risk factors.
  • A significant sex-by-aortic stiffness interaction was observed; the association between characteristic impedance and worse GLS persisted in women but not in men.

Conclusions:

  • Multiple measures of aortic stiffness are cross-sectionally linked to impaired GLS, independent of hemodynamic factors.
  • The findings suggest a direct mechanical link between aortic stiffness and reduced longitudinal strain.
  • Sex-specific differences in the relationship between aortic stiffness and GLS warrant further investigation.