Search Results - "Au, Jason S."

A Deep Learning Approach to Resolve Aliasing Artifacts in Ultrasound Color Flow Imaging by Nahas, Hassan, Au, Jason S., Ishii, Takuro, Yiu, Billy Y. S., Chee, Adrian J. Y., Yu, Alfred C. H.

“…Despite being used clinically as a noninvasive flow visualization tool, color flow imaging (CFI) is known to be prone to aliasing artifacts that arise due to…”
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Retrograde shift in carotid artery longitudinal wall motion after one-year follow-up in children by Au, Jason S., Proudfoot, Nicole A., Timmons, Brian W., MacDonald, Maureen J.

“…Cross-sectional studies suggest that arterial stiffness increases during childhood; however, this evidence stems from pressure-dependent arterial distension,…”
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Diastolic Carotid Artery Longitudinal Wall Motion Is Sensitive to Both Aging and Coronary Artery Disease Status Independent of Arterial Stiffness by Au, Jason S, Valentino, Sydney E, McPhee, Patrick G, MacDonald, Maureen J

“…Abstract We investigated the ability of systolic and diastolic carotid artery longitudinal wall motion (CALM) to delineate expected differences in arterial…”
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Ambulatory Monitoring of Cerebrovascular Responses to Upright Posture and Walking in Older Adults with Heart Failure by Murray, Kevin R., Poirier, Jessica A., Au, Jason S., Hedge, Eric T., Robertson, Andrew D., Heckman, George A., Hughson, Richard L.

“…Insufficient cardiac output in individuals with heart failure (HF) limits daily functioning and reduces quality of life. Although lower cerebral perfusion,…”
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Carotid extra-media thickness increases with age, but is not related to arterial stiffness in adults by Choi, Hon Lam, Au, Jason S., MacDonald, Maureen J.

“…Assessment of carotid artery perivascular adipose tissue through carotid artery extra-media thickness (EMT) ultrasonography has emerged as a novel assessment…”
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Riding the Plane Wave: Considerations for In Vivo Study Designs Employing High Frame Rate Ultrasound by Au, Jason, Hughson, Richard, Yu, Alfred

“…Advancements in diagnostic ultrasound have allowed for a rapid expansion of the quantity and quality of non-invasive information that clinical researchers can…”
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Physiological basis for longitudinal motion of the arterial wall by Athaide, Chloe E, Spronck, Bart, Au, Jason S

“…As opposed to arterial distension in the radial plane, longitudinal wall motion (LWM) is a multiphasic and bidirectional displacement of the arterial wall in…”
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Case Studies in Physiology: Using premature ventricular contractions to understand the regulation of carotid artery longitudinal wall motion by Stevens, Kailey A., Au, Jason S.

“…Benign arrhythmias can be a useful tool to probe new hypotheses in physiology. We tested the control of longitudinal motion of the common carotid artery wall…”
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Supporting evidence for an "arterial pump" venous return mechanism in humans by Cohen, Jeremy N, Samra, Rose A, Au, Jason S

“…Blood flow in large veins is dependent on arterial-atrial pressure gradients and pumping mechanisms in concert with valve recruitment. Classic descriptions of…”
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Seated Elliptical Exercise, But Not Periodic Standing, Alleviates Sitting-Induced Changes to Arterial Wave Reflections by Athaide, Chloe E, Robertson, Andrew D, Devries, Michaela C, Au, Jason S

“…Sedentary behavior may contribute to increased central wave reflection due to associated peripheral vasoconstriction, yet its impact on central hemodynamics…”
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Short-term vascular responses to spring and fall daylight savings time shifts by Al-Bakry, Dara, Athaide, Chloe E, Pathmarajan, Rishiga, Kuhn, Tara, Middleton, Laura E, Au, Jason S

“…Daylight saving time (DST) is a Western biannual time transition, setting the clock back 1 h in the fall and forward 1 h in the spring. There is an…”
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Peripheral artery endothelial function responses to altered shear stress patterns in humans by Cheng, Jem L., Au, Jason S., MacDonald, Maureen J.

“…New Findings What is the central question of this study? What is the effect of altered shear stress pattern, with or without concurrent neurohumoral and…”
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Impact of Ultrasound Scanning Plane on Common Carotid Artery Longitudinal Wall Motion by Bryans, Carol G., Cohen, Jeremy N., Athaide, Chloe E., Pugh, Christopher J.A., Au, Jason S.

“…The arterial wall not only moves in the radial direction to expand circumferentially but also moves in the axial (longitudinal) direction in a predictable…”
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Serum concentrations of ketones increase after hand-ergometer exercise in persons with cervical spinal cord injuries: a preliminary prospective study by Nishiyama, Kazunari, Nishimuara, Yukihide, Au, Jason S, Kamijo, Yoshi-ichiro, Moriki, Takashi, Mukai, Yuki, Umemoto, Yasunori, Kouda, Ken, Ogawa, Takahiro, Tajima, Fumihiro

“…Study design Experimental study. Objectives To compare lipid profiles during moderate-intensity exercise between persons with cervical spinal cord injuries…”
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Heating-induced peripheral limb microvascular vasodilation reduces arterial wave reflection by Athaide, Chloe E, Cohen, Jeremy N, Stevens, Kailey A, Robertson, Andrew D, Au, Jason S

“…Arterial wave reflection augments cardiac afterload increasing myocardial demands. Mathematical models and comparative physiology suggest that the lower limbs…”
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The influence of respiration, neck flexion, and arterial segment on carotid artery longitudinal wall motion by Athaide, Chloe E, Samuel, Maryia, Jutlah, Lauren B L, Bryans, Carol G, Au, Jason S

“…Although carotid artery longitudinal wall motion (CALM) has been highly detailed in cross-sectional studies, there is little evidence to explain population…”
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Characterization of internal jugular vein region-specific distension and flow patterns during progressive volume shifting by Cohen, Jeremy N, Hedge, Eric T, Greaves, Danielle K, Robertson, Andrew D, Nahas, Hassan, Yu, Alfred C H, Petersen, Lonnie G, Au, Jason S

“…Blood volume shifts during postural adjustment lead to irregular distension of the internal jugular vein (IJV). In microgravity, distension may contribute to…”
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Are Wearable Photoplethysmogram-Based Heart Rate Variability Measures Equivalent to Electrocardiogram? A Simulation Study by Dewig, Hayden G., Cohen, Jeremy N., Renaghan, Eric J., Leary, Miriam E., Leary, Brian K., Au, Jason S., Tenan, Matthew S.

“…Background Traditional electrocardiography (ECG)-derived heart rate variability (HRV) and photoplethysmography (PPG)-derived “HRV” (termed PRV) have been…”
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Attenuating intrathoracic pressure swings decreases cardiac output at different intensities of exercise by Angus, Sarah A., Taylor, Joshua L., Mann, Leah M., Williams, Alexandra M., Stöhr, Eric J., Au, Jason S., Sheel, Andrew William, Dominelli, Paolo B.

“…Intrathoracic pressure (ITP) swings that permit spontaneous ventilation have physiological implications for the heart. We sought to determine the effect of…”
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Reduced common carotid artery longitudinal wall motion and intramural shear strain in individuals with elevated cardiovascular disease risk using speckle tracking by Tat, Jimmy, Au, Jason S., Keir, Peter J., MacDonald, Maureen J.

“…Summary Longitudinal motion of the intima–media and adventitia layers of the common carotid artery (CCA) wall were assessed with ultrasound speckle tracking in…”
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