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Management strategy for patients with chronic severe aortic regurgitation. Preoperative coronary angiography should be performed routinely, as determined by age, symptoms, and coronary risk factors. Cardiac catheterization and angiography may also be helpful when there is a discrepancy between clinical and echocardiographic findings. “Stable” refers to stable echocardiographic measurements. In some centers, serial follow-up may be performed with radionuclide ventriculography (RVG) or magnetic resonance imaging (MRI) rather than echocardiography (echo) to assess left ventricular (LV) volume and systolic function. AVR, aortic valve replacement; DD, end-diastolic dimension; EF, ejection fraction; eval, evaluation; SD, end-systolic dimension. (Modified from Bonow et al.) Source: Chapter 237. Valvular Heart Disease, Harrison's Principles of Internal Medicine, 18e Citation: Longo DL, Fauci AS, Kasper DL, Hauser SL, Jameson J, Loscalzo J. Harrison's Principles of Internal Medicine, 18e; 2012 Available at: http://mhmedical.com/ Accessed: May 13, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved