Left ventricular lateral annulus and left atrial free-wall velocity time integral indicate thromboembolism in patients with rheumatic atrial fibrillation

Mark C. Arokiaraj, Cristina Pislaru, Shanmugam Vellayappan, Sitalakshmi Subramanian, Kiron Varghese, Chandrakanth B. Patil, Gurappa G. Shetty, Cherian George, Vishal Gupta, Shamanna S. Iyengar

Research output: Contribution to journalArticle

Abstract

Background: Low wall motion and stasis increase the likelihood of clot formation. We hypothesized that tissue Doppler indices of left atrial (LA) motion are reduced in the presence of LA thrombi and may be predictive for clot formation in patients with atrial fibrillation (AF). Methods: We did an observational study for 3 years in 118 patients with rheumatic mitral valve disease in chronic AF who had not received anticoagulation, with (Group 1, n = 36) and without (Group 2, n = 82) thromboembolism. Pulsed tissue Doppler systolic velocities and velocity time integrals (VTIs) were measured in all four chambers. A mean LA VTI was calculated. LA strain during ventricular systole was calculated using VTI and distance between two LA locations. Results: Logistic regression analysis showed that, after adjusting for age, gender, diabetes, hypertension, LA size, and left ventricular (LV) ejection fraction, mean LA VTI [Odds ratio (OR) 0.69, 95%CI (0.56-0.86, P = 0.03)] and lateral mitral annulus VTI [OR 0.15 (0.04-0.56, P = 0.03)] were associated with clot formation. The addition of these two parameters to the conventional risk factors increased the ability to predict thromboembolism (Nagelkerke R2= 0.32-0.50, P = 0.01; area under the curve 0.83 by receiver operating characteristic analysis, P = 0.01). LA strain also had potential to indicate clot formation (0.9 ± 13.8 vs. -8.2 ± 15.1%, group 1 vs. 2, respectively, P = 0.01). Conclusion: Patients with chronic AF and thromboembolism have reduced LA and LV motion independently of LA size and LV ejection fraction. Tissue Doppler parameters may have potential to predict clot formation in these patients.

Original languageEnglish (US)
Pages (from-to)1038-1048
Number of pages11
JournalEchocardiography
Volume27
Issue number9
DOIs
StatePublished - Oct 1 2010

Keywords

  • atrial fibrillation
  • echocardiography
  • stroke
  • thromboembolism
  • tissue Doppler imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

Fingerprint Dive into the research topics of 'Left ventricular lateral annulus and left atrial free-wall velocity time integral indicate thromboembolism in patients with rheumatic atrial fibrillation'. Together they form a unique fingerprint.

  • Cite this

    Arokiaraj, M. C., Pislaru, C., Vellayappan, S., Subramanian, S., Varghese, K., Patil, C. B., Shetty, G. G., George, C., Gupta, V., & Iyengar, S. S. (2010). Left ventricular lateral annulus and left atrial free-wall velocity time integral indicate thromboembolism in patients with rheumatic atrial fibrillation. Echocardiography, 27(9), 1038-1048. https://doi.org/10.1111/j.1540-8175.2010.01198.x