"Regional Blood Flow Characteristics in Response to Maximal Voluntary C" by Michael E. Danduran, Spencer A. Murphy et al.
 

Regional Blood Flow Characteristics in Response to Maximal Voluntary Contractions are Attenuated in Stroke Patients

Document Type

Article

Language

eng

Format of Original

2 p.

Publication Date

5-2016

Publisher

American College of Sports Medicine

Source Publication

Medicine & Science in Sports & Exercise

Source ISSN

0195-9131

Abstract

PURPOSE: We sought to evaluate the regulation of blood flow to the exercising muscle during maximal voluntary contractions (MVC) in patients having suffered a stroke compared to healthy controls.

METHODS: A pilot investigation of 5 patients having suffered a stroke and 5 controls was performed to assess regional flow patterns via NIRS during MVC with the leg at 90 degrees (Biodex: Shirley, New York). The dominant leg of controls as well as both paretic and non-paretic legs in patients were tested. NIRS values were used to evaluate regional flow in the rectus femoris and reported as a high, low, and percent change during the MVC effort.

RESULTS: Control subjects had a greater peak torque (241.8 ± 32.2 Nm) when compared to the non-paretic leg (87.4 ± 24.8Nm) or paretic leg (59.4 ± 31.4 Nm) of the patients with stroke (ANOVA, p

CONCLUSIONS: Individuals having suffered from a stroke have an attenuated blood flow response as assessed by NIRS monitoring during a MVC maneuver. These findings are not isolated to the paretic leg but exist equally in the non-paretic limb suggesting the potential of global perfusion issues in the patients having suffered a stroke. Further investigation into the mechanisms behind these improvements and the impact on leg function is warranted.

Comments

Medicine & Science in Sports & Exercise, Vol. 48, No. 5S (May 2016): 1010-1011. DOI.

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