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Related Concept Videos

Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

36
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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Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

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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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Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

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Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
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Related Experiment Video

Updated: Jul 30, 2025

Murine Echocardiography of Left Atrium, Aorta, and Pulmonary Artery
08:17

Murine Echocardiography of Left Atrium, Aorta, and Pulmonary Artery

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Longitudinal Changes in Left Ventricular Diastolic Function in Late Life: The ARIC Study.

Li Zhao1, Rani Zierath2, Brian Claggett2

  • 1Division of Cardiovascular Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA; Division of Cardiovascular Medicine, Sixth Medical Center, PLA General Hospital, Beijing, China.

JACC. Cardiovascular Imaging
|May 13, 2023
PubMed
Summary
This summary is machine-generated.

Diastolic function declines significantly in older adults over six years, especially those with cardiovascular risks. This deterioration is linked to new-onset shortness of breath.

Keywords:
agingcardiovascular risk factorsdyspneaheart failureleft ventricular diastolic function

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Area of Science:

  • Cardiology
  • Gerontology
  • Echocardiography

Background:

  • Limited data exists on longitudinal diastolic function changes in the very old.
  • The elderly population faces the highest risk for heart failure (HF).

Purpose of the Study:

  • To quantify intraindividual longitudinal changes in diastolic function over six years in late life.
  • To assess the impact of cardiovascular risk factors on these changes.

Main Methods:

  • Utilized echocardiography data from 2,524 participants in the Atherosclerosis Risk In Communities (ARIC) study.
  • Measured tissue Doppler e', E/e' ratio, and left atrial volume index (LAVI) at two time points, approximately 6.6 years apart.
  • Analyzed changes in diastolic function in relation to cardiovascular risk factors and development of dyspnea.

Main Results:

  • Diastolic function generally deteriorated over the study period, with decreased e' and increased E/e' ratio and LAVI.
  • The proportion of participants with abnormal diastolic measures increased from 17% to 42%.
  • Participants with cardiovascular risk factors showed greater deterioration in E/e' and LAVI, which was associated with new-onset dyspnea.

Conclusions:

  • Diastolic function declines over time in late life, particularly in individuals with cardiovascular risk factors.
  • These changes are associated with the development of dyspnea.
  • Further research is needed to explore risk factor prevention and control to mitigate these functional changes.