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Related Concept Videos

Aortic Regurgitation III: Medical Management01:25

Aortic Regurgitation III: Medical Management

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...
Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

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...
Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

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...
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...
Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

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...
Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

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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Related Experiment Video

Updated: Jun 3, 2026

Studying Left Ventricular Reverse Remodeling by Aortic Debanding in Rodents
07:26

Studying Left Ventricular Reverse Remodeling by Aortic Debanding in Rodents

Published on: July 14, 2021

Left ventricular remodeling with intensive exercise after aortic valve replacement.

Axel Pressler1, Johannes Scherr, Walter Eichinger

  • 1Department for Prevention and Sports Medicine, Technische Universität München, Munich, Germany. pressler@sport.med.tum.de

The Journal of Heart Valve Disease
|March 17, 2011
PubMed
Summary

Regular exercise, including intensive endurance training, appears safe and beneficial for cardiac remodeling after aortic valve replacement (AVR). This case study shows significant improvements in heart function and exercise capacity post-surgery.

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Permanent Ligation of the Left Anterior Descending Coronary Artery in Mice: A Model of Post-myocardial Infarction Remodelling and Heart Failure
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Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction

Published on: February 13, 2021

Area of Science:

  • Cardiology
  • Exercise Physiology
  • Cardiac Surgery

Background:

  • The impact of exercise on cardiac remodeling following aortic valve replacement (AVR) is not well understood.
  • Severe aortic regurgitation can lead to left ventricular dilation and reduced ejection fraction.

Observation:

  • A 49-year-old male patient with severe aortic regurgitation underwent biological AVR, presenting with reduced left ventricular ejection fraction (LVEF) of 45% and significant left ventricular dilation (LVEDD 96 mm).
  • Post-surgery, the patient engaged in intensive endurance training, cycling 9,500 km in one year.

Findings:

  • The patient experienced near-normalization of LVEF (to 51%) and LVEDD (to 60 mm) within a year.
  • Peak VO2 increased from 27 to 52 ml/min/kg, and peak exercise capacity rose from 75 to 283 W.

Implications:

  • Intensive endurance exercise following AVR appears feasible and safe.
  • Regular exercise may promote beneficial cardiac remodeling and improve functional capacity after aortic valve replacement.