Visualization of the heart’s basic tomographic imaging planes by various transducer positions. The long-axis plane (A) can be imaged in the parasternal, suprasternal, and apical positions; the short-axis plane (B) in the parasternal and subcostal positions; and the four-chamber plane (C) in the apical and subcostal positions. Reproduced from Fuster V, Walsh RA, Harrington RA. Hurst’s The Heart. 13th ed. Figure 18-13. Available at: www.accessmedicine.com. Copyright © The McGraw-Hill Companies, Inc. All rights reserved.