Henni S, Ammi M, Gourdier AS, Besnier L, Signolet I, Colas-Ribas C, Picquet J, Abraham P. Ankle brachial index is equally predictive of exercise-induced limb ischemia in diabetic and non-diabetic patients with walking limitation.
J Diabetes Complications 2018;
32:702-707. [PMID:
29724591 DOI:
10.1016/j.jdiacomp.2018.03.011]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 02/20/2018] [Accepted: 03/25/2018] [Indexed: 01/09/2023]
Abstract
BACKGROUND
In diabetic patients, arterial stiffness may impair compressibility of vessels and result in higher ankle to brachial index (ABI) than in non-diabetic subjects.
METHODS
We studied 1972 non-diabetic and 601 diabetic patients, with suspected peripheral artery disease, Exercise transcutaneous oxygen pressure (Ex-tcpO2), expressed in DROP index (limb tcpO2 change minus chest tcpO2 change), is insensitive to arterial stiffness and can estimate exercise-induced regional blood flow impairment (RBFI). A minimal DROP <-15 mm Hg indicates the presence of RBFI (positive test). ABI was simplified to a category variable (ABIc) by rounding ABI to the closest first decimal.
RESULTS
In the ABIc range 0.4 to 1.1 linear regression for mean DROP values were: y = 34 x - 53; (R2 = 0.211) and y = 33 x - 52; (R2 = 0.186) in diabetic and Non-diabetic patients, respectively. Both Db and non-D patients showed a high proportion of positive Ex-tcpO2 tests for ABIc in the normal range (ABIc: 1.0 and over) from 27.1 to up to 58%. More than half of patients with borderline ABI (ABIc = 0.9) had RBFI during exercise. it was 65.6% in diabetic and 58.5% non-diabetic patients.
CONCLUSIONS
Resting ABI was not a better predictor of exercise-induced RBFI in non-Db than in Diabetic patients. Our results highlights the interest of still measuring resting-ABI in diabetic patients to argue for the vascular origin of exertional limb pain, but also of performing exercise tests in patients with walking impairment.
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