Comparing Measurements of CT Angiography, TEE, and Fluoroscopy of the Left Atrial Appendage for Percutaneous Closure

Abstract

All 3 imaging modalities correlated with ACP landing zone and WATCHMAN ostium measurements, with CCTA providing the largest measurements, followed by TEE and fluoroscopy.

Short‐term safety and efficacy of left atrial appendage closure with the WATCHMAN device in patients with small left atrial appendage ostia

“…Because the LAA ostium is most commonly oval in shape, larger LAA ostial widths can often be found on 120–135 degree planes rather than at 45–90 degrees . Several studies have found that three‐dimensional (3‐D) TEE and cardiac computer tomography angiography (CCTA) more accurately assesses the true LAA ostial width, whereas 2‐D TEE may tend to underestimate the LAA orifice area …”

Imaging for percutaneous left atrial appendage closure

“…CCTA maximal LAA diameter measurements were on average 1–2 mm larger than TEE, and 2–4 mm larger than fluoroscopy. TEE diameter measurements were on average 1–2 mm larger than fluoroscopy . These studies thus show that CCTA provided the largest LAA measurements and can more accurately predict device size.…”

Long‐term follow‐up after left atrial appendage occlusion with comparison of transesophageal echocardiography versus computed tomography to guide medical therapy and data about postclosure cardioversion

“…Saw et al. furthermore compared the measurements of the LAA using CT angiography, TEE, and fluoroscopy . Mohrs et al.…”