Author + information
- Hyung Bok Park,
- Byunghwan Jeon Byunghwan Jeon,
- Yoonmi Hong and
- Hyuk-Jae Chang
Background: After left atrial appendage (LAA) device closure, peri-device leakage into the LAA persists due to incomplete occlusion. We evaluated whether novel 3 dimensional geometric computed tomography (CT) analysis enable to predict incomplete occlusion of LAA.
Methods: In this study, 53 patients who underwent LAA device closure were retrospectively enrolled. We defined peri-device leakage as the presence of a Doppler signal inside the LAA after device deployment (n=9) compared with patients without peri-device leakage (n=44). Two normal vectors (perpendicular lines to planes) were acquired from interatrial septum (IAS), and LAA orifice (Fig a, c); angle θ was defined between IAS normal vector and LAA orifice normal vector (Fig. b). Angle φ was defined between three points where the three centroids of inferior vena cava (IVC) outlet, IAS, and LAA orifice (Fig. a). Distance was measured from IVC outlet to IAS (L1) and from IAS to LAA orifice (L2) respectively (Fig a).
Results: Leakage group showed longer L1 (38.5 vs. 32.0mm, p=0.01) and shorter L2 (61.0 vs. 64.7mm, p=0.04) compared with non-leakage group. Angle φ showed no difference between two groups (155.3 vs. 152.5, p=0.76), however, angle θ showed significantly higher in leakage group compared with non-leakage group (84.4 vs. 53.6, p<0.001).
Conclusions: Long distance between IVC outlet and IAS, Short distance between IAS and LAA orifice, and higher angle between IAS and LAA orifice normal vectors might be good predictors for incomplete LAA occlusion.
Poster Hall, Hall C
Sunday, March 19, 2017, 9:45 a.m.-10:30 a.m.
Session Title: Non Invasive Imaging: New Technologies
Abstract Category: 27. Non Invasive Imaging: CT/Multimodality, Angiography, and Non-CT Angiography
Presentation Number: 1292-240
- 2017 American College of Cardiology Foundation