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Benefit of Four-Dimensional Computed Tomography Derived Ejection Fraction of the Left Atrial Appendage to Predict Thromboembolic Risk in the Patients with Valvular Heart Disease

 In-Cheol Kim  ;  Hyuk-Jae Chang  ;  In-Jeong Cho  ;  Chi Young Shim  ;  Geu-Ru Hong  ;  Ji Hoe Heo  ;  Hyo Suk Nam  ;  Young-Jin Kim  ;  Byoung-Wook Choi  ;  Namsik Chung 
 Korean Circulation Journal, Vol.49(2) : 173-180, 2019 
Journal Title
 Korean Circulation Journal 
Issue Date
Atrial appendage ; Computed tomography ; Thrombus
BACKGROUND AND OBJECTIVES: Decreased left atrial appendage (LAA) emptying velocity in transesophageal echocardiography (TEE) is related with higher incidence of thrombus and increased risk of stroke. Patients with valve disease are at higher risk of thrombus formation before and after surgery. The aim of this study was to investigate the role of 4-dimensional cardiac computed tomography (4DCT) to predict the risk of thrombus formation. METHODS: Between March 2010 to March 2015, total of 62 patients (mean 60±15 years old, male: 53.2%) who underwent 4DCT and TEE for cardiac valve evaluation before surgery were retrospectively included in the current study. Fractional area change in TEE view and emptying velocity at left atrial appendage in TEE view (VeTEE) were measured. Ejection fraction (EF) of left atrial appendage in computed tomography (EFCT) was calculated by 4DCT with full volume analysis. The best cut-off value of EFCT predicting presence of spontaneous echo contrast (SEC) or thrombus was evaluated, and correlation between the parameters were also estimated. RESULTS: SEC or thrombus was observed in 45.2%. EFCT and VeTEE were significantly correlated (r=0.452, p<0.001). However, fractional area change measured by TEE showed no correlation with VeTEE (r=0.085, p=0.512). EFCT <37.5% best predicted SEC or thrombus in the patients with valve disease who underwent 4DCT and TEE (area under the curve, 0.654; p=0.038). CONCLUSIONS: In the patients who underwent 4DCT for cardiac valve evaluation before surgery, EFCT by volume analysis might have additional role to evaluate LAA function and estimate the risk of thrombus.
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1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Neurology (신경과학교실) > 1. Journal Papers
Yonsei Authors
김영진(Kim, Young Jin) ORCID logo https://orcid.org/0000-0002-6235-6550
김인철(Kim, In Cheol)
남효석(Nam, Hyo Suk) ORCID logo https://orcid.org/0000-0002-4415-3995
심지영(Shim, Chi Young) ORCID logo https://orcid.org/0000-0002-6136-0136
장혁재(Chang, Hyuck Jae) ORCID logo https://orcid.org/0000-0002-6139-7545
조인정(Cho, In Jeong)
최병욱(Choi, Byoung Wook) ORCID logo https://orcid.org/0000-0002-8873-5444
허지회(Heo, Ji Hoe) ORCID logo https://orcid.org/0000-0001-9898-3321
홍그루(Hong, Geu Ru) ORCID logo https://orcid.org/0000-0003-4981-3304
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