Left atrial strain, embolic stroke of undetermined source, and atrial fibrillation detection

Zubair Bashir, Edward W. Chen, Shuyuan Wang, Liqi Shu, Eric D. Goldstein, Maheen Rana, Narendra Kala, Xing Dai, Daniel Mandel, Phinnara Has, Mingxing Xie, Tao Wang, John B. Dickey, Athena Poppas, James Simmons, Christopher Song, Shadi Yaghi, Philip Haines

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1 Scopus citations

Abstract

Background: Atrial cardiopathy is a proposed mechanism of embolic stroke of undetermined source (ESUS). Left atrial (LA) strain may identify early atrial cardiopathy prior to structural changes. We aim to study the associations between LA strain, ESUS, and atrial fibrillation (AF) detection in ESUS. Methods: The study population included patients with ESUS and noncardioembolic (NCE) stroke presenting to the Rhode Island Hospital Stroke Center between January 2016 and June 2017 who underwent transthoracic echocardiography. Speckle tracking echocardiography (STE) was used to measure the three phases of LA strain (reservoir, conduit, and contractile). Binary logistic regression analysis was performed to determine the associations between LA strain and stroke subtype (ESUS vs. NCE) as well as follow-up detection of AF in ESUS patients. Results: We identified 656 patients, 307 with ESUS and 349 with NCE. In binary logistic regression, the lowest tertiles of LA reservoir (adjusted OR 1.944, 95% CI 1.266–2.986, p =.002), contractile (aOR 1.568, 95% CI 1.035–2.374, p =.034), and conduit strain (aOR 2.288, 95% CI 1.448–3.613, p =.001) were more likely to be significantly associated with ESUS compared to NCE stroke. Among all ESUS patients, the lowest tertiles of LA reservoir strain (OR 2.534, 95% CI 1.029–6.236, p =.043), contractile strain (OR 2.828, 95% CI 1.158–6.903, p =.022), and conduit strain (OR 2.614, 95% CI 1.003–6.815, p =.049) were significantly associated with subsequent detection of AF. Conclusion: Reduced LA strain is associated with ESUS occurrence and AF detection in ESUS patients. Therefore, quantification of LA strain in ESUS patients may improve risk stratification and guide secondary prevention strategies.

Original languageEnglish
Article numbere15738
JournalEchocardiography
Volume41
Issue number1
DOIs
StatePublished - Jan 2024

Keywords

  • atrial cardiopathy
  • atrial fibrillation
  • ESUS
  • left atrial strain

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