Publications by authors named "Andrew Knowles"

(1) Background: Minimal invasive cardiac surgery via right anterolateral thoracotomy for heart valve surgery and other intracardiac procedures proven to have lower postoperative complications. We aim to compare the neurological complications and post-operative outcomes in two cohort groups as well as survival rates up to 5 years postoperatively; (2) Methodology: Retrospective observational study for patients who had minimally invasive cardiac valve surgery with retrograde femoral arterial perfusion between 2007 and 2021 ( = 596) and the categorized patients into two groups based on their age (≥70 years old and below 70). Propensity match analysis was conducted.

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Objective: Isolated tricuspid surgery through median sternotomy can be associated with a high morbidity and mortality. Reports of minimally invasive isolated tricuspid valve operations are rare, but the outcomes are encouraging. We present our experience of endoscopic isolated tricuspid valve surgery.

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Cardiac presentations of Marfan syndrome are not uncommon. Patients with Marfan syndrome can present with aortic pathology, valvular pathology, or both. Hence, Marfan syndrome patients can undergo more than one cardiac surgery in their lifetime.

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A 52-year-old woman with Charcot-Marie-Tooth disease presented with severe dyspnea due to bilateral diaphragmatic paralysis severely compromising respiratory function. There was little in the available literature to guide us regarding management of this unusual condition, and after deliberation, we decided to treat her with a staged plication of bilateral hemidiaphragms. Postoperatively, she demonstrated very good symptomatic relief supported by objective evidence, including improvement in lung function tests.

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Background: Nutrients affect small intestinal protein mass and metabolism, but studies on the effect of nutrients on small intestinal protein degradation are very limited due to a lack of a proper method. The objectives of this study were to establish a method to directly estimate protein degradation in isolated enterocytes from rats and to test the effect of energy substrates on protein degradation.

Methods: Male Sprague-Dawley rats (150-200 g, n>or=8 per treatment) were used.

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We studied the effect of chemotherapy on liver protein synthesis in mice bearing colon 26 adenocarcinoma (C26). Liver protein mass decreased (-32%; P<0.05) in cachectic mice, but protein synthesis increased (20-35%; P<0.

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Oscillatory patterns in H, K, Ca2 and Cl uptake were observed at different regions of the root surface, including root hairs, using a non-invasive ion flux measuring technique (the MIFE™ technique). To our knowledge, this is the first report of ultradian oscillations in nutrient acquisition in the mature root zone. Oscillations of the largest magnitude were usually measured in the elongation region, 2-4 mm from the root apex.

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