ArticleFrontiers in cardiovascular medicine2026
Optimizing left atrial appendage imaging: the diagnostic value of left lateral decubitus cardiac CT angiography.
Article in Frontiers in cardiovascular medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Cardiac computed tomography angiography (CCTA) is widely used to detect left atrial appendage (LAA) thrombus before catheter ablation; however, the conventional biphasic supine (BS) CCTA doubles radiation exposure. This study evaluated whether single-phase left lateral decubitus (LLD) CCTA can maintain diagnostic accuracy while reducing radiation dose. Methods: We retrospectively included 114 patients with atrial fibrillation who underwent CCTA between December 2022 and December 2024 (BS group, Result: In the early arterial phase of the BS group, contrast attenuation in the LAA progressively decreased from the base toward the apex. The LLD position significantly improved contrast agent filling in the left atrial appendage apex (median 444.8 HU vs. 70.3 HU, Z = 8.10, Conclusion: Single-phase LLD-CCTA maintains diagnostic accuracy while reducing radiation exposure by approximately 50% and streamlining workflow. These advantages support prospective, multicenter validation before considering routine clinical adoption.
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