1. A. Parasternal views during diastole (left) and systole (right) from a normal individual. Upper panels: long-axis plane; lower panels: short-axis plane. B. Apical views during diastole (left) and systole (right) from a normal individual. Upper panels: four-chamber plane; lower panels: two-chamber plane. C. Parasternal long-axis views at peak systole before (left) and immediately after exercise (right). The anteroseptal wall moves normally at rest (arrows), but becomes dyskinetic with exercise. D. Apical four-chamber views at peak systole before (left) and immediately after exercise (right). The apical septal, apical, and apical lateral walls become dyskinetic with exercise, suggesting inducible ischemia in the left anterior descending artery territory. E. Parasternal short-axis views (all recorded at peak systole) during dobutamine echocardiography in a patient with three-vessel coronary artery disease. At baseline (upper left panel) the left ventricular systolic function is normal. With low-dose dobutamine (5 μg/kg/min, upper right panel), function improves. With 10 μg/kg/min, however (lower left panel), function is similar to that at baseline. At 20 μg/kg/min (lower right panel), systolic function deteriorates and the left ventricle dilates. This response suggests global ischemia induced by dobutamine infusion. Ao, aorta; LA, left atrium; LV, left ventricle.
Source: Chapter 18. Echocardiography, Hurst's The Heart, 13e
Citation: Fuster V, Walsh RA, Harrington RA. Hurst's The Heart, 13e; 2011 Available at: Accessed: January 05, 2018
Copyright © 2018 McGraw-Hill Education. All rights reserved