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Aortic Valve Surgery With Severe Left Ventricular Dysfunction

  • Blasé A. Carabello
Chapter
Part of the Contemporary Cardiology book series (CONCARD)

Abstract

In most patients with severe aortic stenosis, management is relatively straightforward. Prognosis is excellent even in patients with severe valve obstruction as long as they are asymptomatic. However, once the classic symptoms of angina, syncope, dyspnea, or other symptoms of congestive heart failure (CHF) develop, prognosis dramatically worsens (1,2). Because 75% of symptomatic patients will die within 3 years of the onset of the symptoms unless the aortic valve is replaced, the onset of symptoms is a compelling reason to perform aortic valve replacement. In many asymptomatic patients, left ventricular (LV) hypertrophy normalizes wall stress, and LV systolic function is normal. However, the increase in wall thickness necessary to compensate the increased pressure term of the Laplace equation (stress equals the pressure times the radius divided by twice the thickness) results in reduced LV compliance and diastolic dysfunction (3). Typically, diastolic dysfunction precedes systolic dysfunction; thus, when congestive symptoms do arise, systolic function is usually normal.

Keywords

Aortic Valve Aortic Stenosis Aortic Valve Replacement Total Peripheral Resistance Aortic Valve Disease 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Humana Press Inc. 2005

Authors and Affiliations

  • Blasé A. Carabello
    • 1
  1. 1.Department of Medicine, Baylor College of MedicineVeterans Affairs Medical CenterHouston

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