Background After donation, multiple renal arteries(MA) a remaining kidney may increase the risk of hypertension (HTN). Method This study is a continuation of previous cohort examining if MA leads to HTN. Initially, 688 kidney donors were identified. 243 called, agreed to participate. They were queried about being diagnosed with HTN and current treatment/ medications. In the second era, we standardized a 2 year follow up post donation. We then retrospectively reviewed all follow up clinic visits (n=238). HTN after donation was considered present if patients had blood pressure >140/90 at clinic visit, had been diagnosed with HTN between clinic follow up or being treated with medications for HTN. All study patients were reviewed collectively. Results All donors were evaluated by CT scan. SA and MA groups were compared by chi-squared analysis. A Cox proportional hazards model estimated the association of MA to HTN post donor nephrectomy. Total of 590 patients included in SA group and 317 in MA group. There was no difference in demographics and baseline characteristics of both SA and MA groups.

No difference was noted in patients with HTN after donation in either group, 37 patients and 24 patients in SA and MA groups respectively (Chi2= 0.53, Pr 0.45). Similarly, the number of MA did not increase the risk of HTN after donation (LR Chi2 2.03). Logistic regression analysis adjusted for age, race, BMI and side of donation did not reveal any difference.

Conclusion Living kidney donors with MA don’t have increased risk of HTN after kidney donation even after adjusting to age, race BMI and side of donation.

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