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- W2059658637 abstract "Although the significance of type II endoleaks (T2ELs) on the long-term outcome of endovascular repair (EVAR) of abdominal aortic aneurysms (AAAs) is debatable, duplex ultrasound (DUS) parameters have been suggested to be predictive of their closure or persistence. The purpose of this study was to determine which, if any, of these variables was associated with persistent T2ELs or increased AAA sac diameter. Between 1998 and 2009, 278 patients underwent EVAR and postoperative DUS surveillance during long-term follow-up (range, 1-11 years) in our accredited noninvasive vascular laboratory by one of three experienced technologists. DUS was used to measure intrasac flow velocity (IFV), spectral Doppler waveform (SDW) patterns, post-EVAR sac diameter, and number of T2ELs per patient. T2ELs developed in 38 patients (14%) after EVAR: 14 had T2ELs that resolved and sac diameter decreased or remained the same (average IFV, 42 cm/s). SDW patterns were monophasic in 5, biphasic in 7, and bidirectional in 2. Multiple T2ELs were not present (0%) in any patient. Twelve patients had T2ELs that persisted but sac diameter decreased or remained the same (average IFV, 47 cm/s). SDW patterns were monophasic in 1, biphasic in 5, bidirectional in 5, and undetermined in 1. Multiple T2ELs were found in two patients (17%). T2ELs persisted in 12 patients and were associated with increased sac diameter (average IFV, 43 cm/s). SDW patterns were monophasic in 1, biphasic in 2, and bidirectional in 9. Multiple T2Els were identified in nine patients (75%). None of the 38 patients with T2ELs treated with selective surgical or endovascular intervention for enlarging sac diameters (9 of 12) experienced a ruptured aneurysm. Contrary to previous reports, parameters such as intrasac flow velocity and spectral Doppler waveform patterns of T2ELs did not correlate with increased post-EVAR sac diameter. The presence of multiple T2ELs may be the strongest factor predictive of increased sac diameter." @default.
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- W2059658637 date "2010-04-01" @default.
- W2059658637 modified "2023-09-28" @default.
- W2059658637 title "Duplex Ultrasound Factors Predicting Persistent Type II Endoleak and Increases in Abdominal Aortic Aneurysm Sac Diameter After Endovascular Aneurysm Repair" @default.
- W2059658637 doi "https://doi.org/10.1016/j.jvs.2010.01.005" @default.
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