Table 1.

Studies investigating the outcomes of preoperative aortic branch embolization.

Study, Year	Population	Results & Conclusions
Samura et al., 2020 [51]	53 pts with IMA embolization during EVAR vs. 53 pts without	IMA embolization had lower T2EL incidence compared to the non-embolization group (13/53, 24.5% vs. 26/53, 49.1%; p = 0.009) and greater aneurysmal sac shrinkage (−5.7 ± 7.3 mm vs. −2.8 ± 6.6 mm; p = 0.037).
Manunga et al., 2017 [43]	258 pts with an attempted IMA embolization before EVAR vs. control group	Embolization protected against T2EL and led to fewer reinterventions.
Burbelko et al., 2014 [44]	Embolization with AMPLATZER plugs in 45 visceral and lumbar arteries with diameter > 2.5 mm	No T2EL postoperatively resulting in sac shrinkage in the embolization group.
Ward et al., 2013 [45]	108 pts with IMA embolization before EVAR vs. 158 pts with a patent IMA	IMA coil embolization prior to EVAR had reduced rate of T2EL compared to the non-embolization group (37/108, 34.3% vs. 78/158, 49.4%; p = 0.015), fewer secondary interventions (0.9% vs. 7.6%; p = 0.013), and fewer cases of increase in aneurysmal sac size at 24 months.
Nevala et al., 2010 [47]	40 pts with IMA coil embolization prior to EVAR vs. 39 pts without	Embolization led to a significantly lower T2EL rate (25% vs. 59%) but did not have any influence on the sac size.
Axelrod et al., 2004 [46]	102 pts with an attempted IMA embolization vs. control group	The non-embolization group had a significantly higher rate of T2EL, while the embolization group had greater shrinkage of the aneurysmal sac.
Bonvini et al., 2003 [48]	23 pts with preprocedural embolization of patent lumbar and IMA	There was only 1 (4.5%) T2EL from a patent lumbar artery, with no sac expansion after 2 years.
Parry et al., 2002 [49]	Preoperative successful IMA embolization in 13 of 16 pts and successful lumbar embolization in 8 of 13 pts	No T2ELs were developed in patients who underwent preoperative embolization, and in these cases a 3 mm median decrease in sac diameter was observed.
Gould et al., 2001 [50]	20 pts with successful or partly successful lumbar and IMA preoperative embolization vs. 43 pts without	20% T2EL rate and 0.5 mm mean sac shrinkage in the embolization group.