Objective: To investigate the value of left atrial appendage CT angiography (CTA) double phase scan in the diagnosis of left atrial appendage thrombus in patients with atrial fibrillation. Methods: Thirty-six patients with atrial fibrillation were retrospectively collected from January 2020 to June 2022, and all patients underwent left atrial appendage (LAA) CTA double phase scan and transesophageal echocardiography (TEE). The sensitivity, specificity, positive predictive value, negative predictive value and diagnostic compliance rate of LAA-CTA phase I and phase II diagnoses of LAA thrombus were calculated using the TEE test as the "gold standard", and the consistency of the LAA-CTA phase I and phase II diagnoses with the TTE diagnoses was evaluated using the Kappa test. Results: Twenty-one patients with left atrial appendage thrombus diagnosed in the first stage of LAA-CTA, 15 patients with left atrial appendage thrombus diagnosed in the second stage, and 14 patients with left atrial appendage thrombus diagnosed by TTE; the sensitivity, specificity, positive predictive value, negative predictive value and diagnostic compliance rate of LAA-CTA phase I for the diagnosis of LAA thrombus were 64.29%, 45.45%, 42.86%, 66.67% and 52.78%, respectively; the sensitivity, specificity, positive predictive value, negative predictive value and diagnostic compliance rate of LAA-CTA phase II for the diagnosis of LAA thrombus were 92.86%, 90.91%, 86.67%, 95.24% and 91.67%, respectively, with statistically significant differences (P＜0.05). The results of LAA-CTA phase I diagnosis of left atrial appendage thrombus were in general agreement with TEE diagnosis (Kappa=0.089), while the results of LAA-CTA phase II diagnosis of left atrial appendage thrombus were in better agreement with TEE diagnosis (Kappa=0.827), with statistically significant differences (P＜0.05). Conclusion: The sensitivity, specificity, and diagnostic compliance rate of the second-stage scan are higher, and the results of the second-stage diagnosis of thrombus are in better agreement with TEE, so the left atrial appendage CTA double phase scan method has higher clinical application value in the diagnosis of LAA thrombus.
QI Dong
,
YAO Chuanshun
,
YAO Muzi
,
JIA Yuan
,
HU Shumin
. The value of dual phase left atrial appendage CTA scanning in the diagnosis of left atrial appendage thrombus in patients with atrial fibrillation[J]. Journal of Baotou Medical College, 2024
, 40(2)
: 62
-66
.
DOI: 10.16833/j.cnki.jbmc.2024.02.011
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