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Left Atrial Remodeling in Response to Aortic Valve Replacement: Pathophysiology and Myocardial Strain Analysis

Matteo Lisi1,2,3, Maria Concetta Pastore1, Alessio Fiorio2,4

  • 1Department of Medical Biotechnologies, Division of Cardiology, University of Siena, 53100 Siena, Italy.

Life (Basel, Switzerland)
|December 23, 2022
PubMed

Insights

Severe aortic stenosis (AS) causes heart remodeling in the left ventricle and atrium, increasing atrial fibrillation risk. Myocardial strain analysis offers early detection of dysfunction and outcome prediction in AS patients.

Area of Science:

  • Cardiology
  • Cardiovascular Imaging
  • Cardiac Physiology

Background:

  • Severe aortic stenosis (AS) is a prevalent valvular heart disease in the elderly, leading to poor outcomes with medical management alone.
  • AS induces chronic pressure overload, resulting in left ventricular (LV) hypertrophy, myocardial stiffness, and diastolic dysfunction.
  • Left atrial (LA) remodeling, including dilation and fibrosis, occurs secondary to AS, impairing intrinsic function and elevating atrial fibrillation risk.

Purpose of the Study:

  • To review left ventricular (LV) and left atrial (LA) remodeling in patients with aortic stenosis (AS).
  • To describe the changes in LV and LA remodeling before and after aortic valve replacement (AVR).
  • To highlight the utility of myocardial strain analysis in assessing cardiac dysfunction and predicting outcomes in AS.

Main Methods:

  • Review of existing literature on AS, cardiac remodeling, and myocardial strain analysis.
  • Focus on speckle-tracking echocardiography for assessing myocardial deformation.
  • Analysis of studies evaluating LV and LA remodeling pre- and post-AVR.

Main Results:

  • AS leads to significant LV hypertrophy and LA dilation and fibrosis.
  • Myocardial strain analysis detects subtle cardiac dysfunction earlier than traditional parameters like LV ejection fraction.
  • Strain analysis can predict clinical outcomes in AS patients undergoing AVR.

Conclusions:

  • LV and LA remodeling are key pathophysiological features of AS with significant clinical implications.
  • Aortic valve replacement can reverse some aspects of cardiac remodeling.
  • Myocardial strain analysis is a valuable tool for comprehensive assessment and prognosis in AS.

Keywords:
aortic stenosisleft atrial strainremodellingreplacementspeckle tracking

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