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Velocity encoded cardiovascular magnetic resonance to assess left atrial appendage emptying

Authors :
Muellerleile Kai
Sultan Arian
Groth Michael
Steven Daniel
Hoffmann Boris
Adam Gerhard
Lund Gunnar K
Rostock Thomas
Willems Stephan
Source :
Journal of Cardiovascular Magnetic Resonance, Vol 14, Iss 1, p 39 (2012)
Publication Year :
2012
Publisher :
Elsevier, 2012.

Abstract

Abstract Background The presence of impaired left atrial appendage (LAA) function identifies patients who are prone to thrombus formation in the LAA and therefore being at high risk for subsequent cardioembolic stroke. LAA function is typically assessed by measurements of LAA emptying velocities using transesophageal echocardiography (TEE) in clinical routine. This study aimed at evaluating the feasibility of assessing LAA emptying by velocity encoded (VENC) cardiovascular magnetic resonance (CMR). Methods This study included 30 patients with sinus rhythm (n = 18) or atrial fibrillation (n = 12). VENC-CMR velocity measurements were performed perpendicular to the orifice of the LAA. Peak velocities were measured of passive diastolic LAA emptying (e-wave) in all patients. Peak velocities of active, late-diastolic LAA emptying (a-wave) were assessed in patients with sinus rhythm. Correlation and agreement was analyzed between VENC-CMR and TEE measurements of e- and a-wave peak velocities. Results A significant correlation and good agreement was found between VENC-CMR and TEE measurements of maximal e-wave velocities (r = 0.61, P Conclusions The assessment of active and passive LAA emptying by VENC-CMR is feasible. Further evaluation is required of potential future clinical applications such as risk stratification for cardioembolic stroke.

Details

Language :
English
ISSN :
1532429X and 10976647
Volume :
14
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Journal of Cardiovascular Magnetic Resonance
Publication Type :
Academic Journal
Accession number :
edsdoj.08448b3611564b77823152ba9a442574
Document Type :
article
Full Text :
https://doi.org/10.1186/1532-429X-14-39