Left Atrial Strain for assessment of left ventricle diastolic dysfunction in acute coronary syndrome patients

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Saoussen Antit
Marwa Abdelhedi
Ridha Fekih
Khalil Bahri
Elhem Boussabeh
Lilia Zakhama

Abstract

Introduction: Patients with acute coronary syndrome (ACS) have a high incidence of Left ventricle diastolic dysfunction (DD). Latest algorithms for the assessment of DD lay on 2D parameters and describe a grading to quantify its severity. However, there persists a “gray zone” of values in which DD remains indeterminate.


Aim:  to analyze the diagnostic value of Left atrium strain (LAS) for categorization of LV DD and assessment of LV filling pressures in ACS patients.


Methods:  Cross-sectional study that prospectively evaluated 105 patients presenting ACS with preserved LV ejection fraction (LVEF). Patients were divided in 4 groups according to the DD grade.


Mean values of LAS, corresponding to three phases of atrial function: reservoir (LASr), conduit (LAScd) and contraction (LASct), were obtained by speckle-tracking echocardiography.


Results:  Mean age was 60±10 years, with a gender ratio of 6.14. LASr and LASct were significantly lower according to DD severity (p combined=0.021, p combined=0.034; respectively). E/e’ ratio was negatively correlated to LASr (r= - 0.251; p= 0.022) and LASct (r= -0.197; p=0.077). Left atrial volume index (LAVI) was also negatively correlated to LASr (r= -0.294, p= 0.006) and LASct (r= -0.3049, p=0.005). Peak tricuspid regurgitation was negatively correlated to LASr (r=-0.323, p=0.017) and LASct (r=-0.319, p=0.020). ...( abstract truncated at 250 words)

Keywords:

Left atrial function , Left ventricular diastolic function , Speckle-tracking echocardiography , Acute coronary syndrome, Left atrial strain

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