Browsing University of Waterloo by Author "Avrutin, Egor"
Now showing items 1-7 of 7
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Association of strength, power, and physical performance with muscle mass and composition in older males: a comparison of muscle thickness, echo intensity, and lean tissue mass
Paris, Michael; Bell, Kirsten Elizabeth; Avrutin, Egor; Mourtzakis, Marina (Canadian Science Publishing, 2022-05)Dual-energy X-ray absorptiometry (DXA) appendicular lean tissue is used to screen older adults for sarcopenia. However, emerging data indicates that ageing-related muscle atrophy largely occurs within specific muscles, ... -
Body size normalization of ultrasound measured anterior upper leg muscle thickness in younger and older males and females
Paris, Michael; Bell, Kirsten Elizabeth; Avrutin, Egor; Mourtzakis, Marina (Nature Publishing Group, 2022-01)BACKGROUND: Ultrasound measurements of the anterior upper leg muscle thickness are often used to quantify muscle mass; however, the ideal normalization approach is unclear. Our primary objective was to examine how the ... -
Clinically Practical Approach for Screening of Low Muscularity Using Electronic Linear Measures on Computed Tomography Images in Critically Ill Patients
Avrutin, Egor; Moisey, Lesley; Zhang, Roselyn; Khattab, Jenna; Todd, Emma; Premji, Tahira; Kozar, Rosemary; Heyland, Daren; Mourtzakis, Marina (Wiley, 2018-07-12)Background: Computed tomography (CT) scans performed during routine hospital care offer the opportunity to quantify skeletal muscle and predict mortality and morbidity in intensive care unit (ICU) patients. Existing methods ... -
Developing measures of muscle health in women diagnosed with breast cancer and in a healthy, young adult reference cohort
Avrutin, Egor (University of Waterloo, 2021-02-12)Skeletal muscle health is an important predictor of survival, treatment toxicity, and physical function in cancer patients and survivors. While accelerated rates of muscle wasting are often observed in patients with advanced ... -
Influence of subcutaneous adipose tissue and skeletal muscle thickness on rectus femurs echo intensity in younger and older males and females
Paris, Michael; Bell, Kirsten Elizabeth; Avrutin, Egor; Rosati, Katherine; Mourtzakis, Marina (Wiley, 2022-09)Objectives—Ultrasound measurements of muscle echo intensity are commonly used surrogates of muscle composition (eg, intramuscular adipose tissue). However, given that soundwaves are increasingly attenuated with tissue ... -
Older males exhibit reduced anterior upper leg and anterior abdominal muscle thickness compared to younger males when matched for relative appendicular lean tissue
Paris, Michael; Bell, Kirsten Elizabeth; Avrutin, Egor; Mourtzakis, Marina (Elsevier, 2021-10)Background Ageing-related muscle atrophy does not occur uniformly across the body; rather, atrophy occurs to a greater extent in specific muscle groups compared to others. However, site-specific comparisons of muscle mass ... -
Ultrasound image resolution influences analysis of skeletal muscle composition
Paris, Michael; Bell, Kirsten Elizabeth; Avrutin, Egor; Mourtzakis, Marina (Wiley, 2020-06-03)Introduction: Analysis of muscle composition using ultrasound requires standardization of several equipment settings (i.e. gain). However, the influence of image resolution, which is altered by imaging depth, on measures ...