JOURNAL ARTICLE

Effect of arteriovenous hemodialysis shunt location on cardiac events in patients having coronary artery bypass graft using an internal thoracic artery

Leonid Feldman, Inna Tkacheva, Shai Efrati, Igor Rabin, Ilia Beberashvili, Oleg Gorelik, Zhan Averbukh, Michal Shani
Therapeutic Apheresis and Dialysis 2014, 18 (5): 450-4
24417873
The possibility of developing coronary steal in patients having coronary artery bypass graft (CABG) using internal thoracic artery (ITA) and ipsilateral upper extremity arteriovenous (AV) hemodialysis shunt has been reported. The impact of this phenomenon on clinical outcomes is uncertain. The aim of this study was to investigate an association between the AV dialysis shunt location regarding the side of the ITA CABG and clinical outcomes. This retrospective cohort study included chronic hemodialysis patients having ITA CABG and upper extremity AV shunt. The patients were divided into two groups: those with ipsilateral and those with contralateral location of ITA CABG and AV shunt. The outcomes were: death from any cause, cardiac death and a first cardiac event. In a group of 112 chronic hemodialysis patients having CABG, 32 had an ipsilateral and 25 had a contralateral location of ITA CABG and an upper extremity AV shunt. Significantly more cardiac events occurred in the group with an ipsilateral compared to a contralateral location of ITA CABGs and dialysis AV shunts (hazard ratio, 2.16 [95% CI, 1.11 to 4.19], P = 0.023). There was no difference between the groups in the all cause mortality risk (hazard ratio, 1.005 [95% CI, 0.43 to 2.37], P = 0.990) or the risk of cardiac death (hazard ratio, 2.43 [95% CI, 0.64 to 9.17], P = 0.191). The ipsilateral location of a CABG with the use of ITA and upper extremity AV hemodialysis shunt may be associated with increased risk of cardiac events.

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