Key result
Pre-TAVR CTA frequently reveals LAA filling defects, but delayed imaging rarely confirms true thrombus.
On CT angiography for TAVR planning, left atrial appendage filling defects are commonly observed, but true LAA thrombus is rarely found when utilizing late-phase imaging.
CTA LAA filling defects on pre-TAVR arterial-phase imaging warrant cautious interpretation; leaves open selective use of late-phase protocols.
Although left atrial appendage (LAA) filling defects are common on CT angiography for transcatheter aortic valve replacement planning, true LAA thrombus is rarely detected with late-phase imaging.
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Trapletti et al. (2026) studied this question. CT angiography for transcatheter aortic valve replacement planning commonly shows left atrial appendage filling defects, though late-phase imaging rarely detects true thrombus.
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