In this task, you are given a passage which has a question and the context. You have to generate an answer to the question based on the information present in the context.

Q: Context: To describe technical challenges encountered using the Ovation endograft for abdominal aortic aneurysms and suggest tips and maneuvers for successful management.', "Deployment of the Ovation's unsupported main body is often associated with the anteroposterior arrangement of the limb gates instead of the usual side-by-side configuration, rendering contralateral catheterization challenging. Successful catheterization of the contralateral limb can be confirmed by lateral deviation of the ipsilateral stiff guidewire caused by balloon inflation within the contralateral limb. Moreover, failure to cannulate the contralateral limb gate due to persistent impingement of the guidewire or compromise of the inflated rings can be overcome using the transbrachial antegrade approach.\Question: Does technical challenge encountered during deployment of the ovation abdominal aortic stent-graft system?

A: Awareness of certain aspects associated with the use of the Ovation device and adoption of the adjunctive techniques herein described helps the interventionist avoid unexpected challenges or manage technical difficulties to maximize the device's safety and effectiveness.
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Q: Context: Physical inactivity has been associated with obesity and related chronic diseases. Understanding built environment (BE) influences on specific domains of physical activity (PA) around homes and workplaces is important for public health interventions to increase population PA.', 'To examine the association of home and workplace BE features with PA occurring across specific life domains (work, leisure, and travel).', 'Between 2012 and 2013, telephone interviews were conducted with participants in four Missouri metropolitan areas. Questions included sociodemographic characteristics, home and workplace supports for PA, and dietary behaviors. Data analysis was conducted in 2013; logistic regression was used to examine associations between BE features and domain-specific PA.', "In home neighborhoods, seven of 12 BE features (availability of fruits and vegetables, presence of shops and stores, bike facilities, recreation facilities, crime rate, seeing others active, and interesting things) were associated with leisure PA. The global average score of home neighborhood BE features was associated with greater odds of travel PA (AOR=1.99, 95% CI=1.46, 2.72); leisure PA (AOR=1.84, 95% CI=1.44, 2.34); and total PA (AOR=1.41, 95% CI=1.04, 1.92). Associations between workplace neighborhoods' BE features and workplace PA were small but in the expected direction.\Question: Does home and workplace built environment support for physical activity?

A: This study offers empirical evidence on BE supports for domain-specific PA. Findings suggest that diverse, attractive, and walkable neighborhoods around workplaces support walking, bicycling, and use of public transit. Public health practitioners, researchers, and worksite leaders could benefit by utilizing worksite domains and measures from this study for future BE assessments.
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Q: Context: Shear stress alteration has been recognized as a predisposing factor for the impairment of endothelial function. Myocardial bridging is a congenital condition associated with alteration in shear stress, however, its impact upon vasoreactivity remains undetermined.', 'This was a case-control designed study with 29 patients with myocardial bridging and 58 patients without myocardial bridging. Endothelium-dependent and endothelium-independent changes in coronary artery diameters, blood flow and wall shear stress were determined after intracoronary infusion of acetylcholine (ACH, 10(-6)-10(-4) mol/L) and nitroglycerine (NTG, 200 microg). Coronary flow velocity reserve (CFVR) was determined after intracoronary injection of adenosine (18-36 microg). In response to ACH, there was more epicardial vasoconstriction at the myocardial bridging site compared with the proximal and distal segments (-29.6+/-21.7 vs. -9.6+/-22.5 and -17.4+/-21.5%, p<0.05) and compared with the control group (-29.6+/-21.7 vs. -5.9+/-36.5%, p<0.001). The response to NTG and CFVR was the same in the case and the control group. Wall shear rate (WSR) was higher in the MB site at baseline and in response to ACH.\Question: Is myocardial bridging associated with alteration in coronary vasoreactivity?

A:
MB is characterised by enhanced WSR and impairment in endothelium-dependent vasorelaxation. These functional alterations may add to the severity of structural lumen compression and thus to the clinical presentation of this congenital abnormality.
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