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Related Concept Videos

Mitral Stenosis III: Medical Management01:26

Mitral Stenosis III: Medical Management

34
Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...
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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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Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

71
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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Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots
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Stentless Versus Stented Aortic Valve Replacement for Aortic Stenosis.

Bo Yang1, Alexander Makkinejad1, Shinichi Fukuhara1

  • 1Department of Cardiac Surgery, Michigan Medicine, University of Michigan, Ann Arbor, Michigan.

The Annals of Thoracic Surgery
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Summary

Long-term outcomes for aortic valve replacement in aortic stenosis patients were similar between stentless and stented bioprostheses. Stented valves are recommended for simpler implantation, despite stentless valves showing lower pressure gradients.

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Area of Science:

  • Cardiovascular Surgery
  • Bioprosthetic Heart Valves
  • Aortic Stenosis Management

Background:

  • Long-term outcomes of aortic valve replacement for aortic stenosis using stentless versus stented bioprostheses remain controversial.
  • Aortic valve replacement is a common procedure for treating aortic stenosis.

Purpose of the Study:

  • To compare the long-term survival and reoperation rates of stentless and stented bioprostheses in patients undergoing aortic valve replacement for aortic stenosis.
  • To evaluate hemodynamic performance differences between stentless and stented valves.

Main Methods:

  • A retrospective study of 1173 patients undergoing aortic valve replacement for aortic stenosis between 2007 and 2018.
  • A propensity score matched cohort of 348 pairs was created to minimize confounding factors.
  • Primary endpoints included long-term survival and incidence of reoperation due to valve degeneration.

Main Results:

  • Immediate postoperative outcomes and overall operative mortality were similar between stentless and stented groups (2.9%).
  • Long-term survival at 10 years was comparable (59% vs 55%, P=0.20) with no significant difference in mortality risk (HR 1.12, P=0.33).
  • 10-year reoperation incidence was similar (5.5% vs 4.7%, P=0.25), but stentless valves showed significantly lower transvalvular pressure gradients at 5 years (7 vs 11 mm Hg, P<0.001).

Conclusions:

  • Both stentless and stented bioprostheses are viable options for aortic valve replacement in aortic stenosis.
  • Stented valves are recommended due to their simpler implantation procedure.
  • While stentless valves offer better hemodynamics, the overall clinical outcomes and reoperation rates are comparable.