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| Evaluation of Volumetric CT Digital Subtraction Angiography and CT Angiography on the Restenosis Efficacy of Stent Placement at Vertebral Artery Ostium |
| DU Junkai, ZHANG Lingyin |
| Tangdu Hospital, Air Force Military Medical University,Xi'an Shaanxi 710038 |
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Abstract 【Objective】To evaluate the efficacy of volumetric CT digital subtraction angiography (VCTDSA) and CT angiography (CTA) in the assessment of restenosis in patients with posterior circulating cerebral infarction after stent placement in the vertebral artery ostium.【Methods】 From January 2020 to July 2022, 82 patients with posterior circulation cerebral infarction who underwent vertebral artery initiation stenting were prospectively selected. Using DSA as the gold standard, CTA, VCTDSA and DSA imaging examinations were performed sequentially. CTA, VCTDSA and DSA were recorded to evaluate the incidence and morphology of arterial stenosis, respectively. Kappa test was used to analyze the consistency between the results of CTA and VCTDSA in detecting arterial stenosis and DSA, and the diagnostic value was evaluated by receiver operating characteristic (ROC) curve.【Results】DSA examination results showed that 22 of 82 patients who underwent vertebral artery initiation stenting had postoperative stenosis, and the stenosis incidence was 26.83%. The Kappa values of CTA, VCTDSA in diagnosing postoperative arterial stenosis were 0.766 and 0.936, respectively. The area under the curve (AUC) of CTA and VCTDSA were 0.839 and 0.938, respectively. DSA examination results showed that there were 22 stenosis vessels, 14 regular stenosis vessels and 8 irregular stenosis vessels in 82 patients who underwent the treatment of vertebral artery initiation stenting. The Kappa values of stenosis artery morphology after diagnosis by CTA, VCTDSA were 0.585 and 0.697, respectively. The AUC of CTA and VCTDSA were 0.777 and 0.839, respectively. 【Conclusion】Both CTA and VCTDSA have higher diagnostic efficacy in restenosis and vascular morphology after stenting at the beginning of vertebral artery, while VCTDSA is superior.
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Received: 25 November 2023
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2024, Vol. 41 
