RT Book, Section A1 Arbustini, Eloisa A1 Serio, Alessandra A1 Favalli, Valentina A1 Narula, Nupoor A1 Grasso, Maurizia A2 Fuster, Valentin A2 Harrington, Robert A. A2 Narula, Jagat A2 Eapen, Zubin J. SR Print(0) ID 1161732945 T1 LEFT VENTRICULAR NONCOMPACTION T2 Hurst's The Heart, 14e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9780071843249 LK accesscardiology.mhmedical.com/content.aspx?aid=1161732945 RD 2024/10/10 AB Cardiac trabecular anatomy is characterized by extreme individual and population variability that corresponds to a sort of individual cardioprinting. In normal hearts, trabeculae undergo continuous and quantifiable geometric changes during the cardiac cycle; they actively provide mechanical leverage during early systolic ejection through contraction, and relaxation occurs during late diastole at larger ventricular volumes.1 In the left ventricle, trabeculae can be minimally represented or may be so numerous and prominent that they confer a “spongy” appearance to the endocardial surface of the ventricles. The latter corresponds to the term left ventricular noncompaction (LVNC).