Author + information
- Received May 5, 2017
- Revision received June 8, 2017
- Accepted June 13, 2017
- Published online October 9, 2017.
- aLeon H. Charney Division of Cardiology, Department of Medicine, New York University Langone Medical Center, New York, New York
- bDepartment of Radiology, New York University Langone Medical Center, New York, New York
- cDepartment of Neuroscience and Physiology, New York University Langone Medical Center, New York, New York
- ↵∗Address for correspondence:
Dr. Leon Axel, Department of Radiology, New York University Langone Medical Center, 660 First Avenue, Room 411, New York, New York 10016.
The interventricular septum (IVS) is a common wall shared by the left ventricle (LV) and the right ventricle (RV). Functionally, the IVS normally behaves like a wall of the LV, with the RV attached to its side, thus maintaining a concave curvature (toward the LV) throughout the cardiac cycle. Normal motion of the IVS is an inward motion toward the left during systole and an outward motion toward the right during diastole. The net septal motion is determined by the pressure on the right and left sides of the IVS, as well as the active tension developed within the wall of the IVS and the intrinsic stiffness of the septal tissue. Variations of the normal septal motion are often termed “paradoxical” septal motion. However, because there are many different variations of the septal motion, this generic term is very broad. Table 1 is a list of causes of abnormal IVS motion (1,2). We have here gathered representative examples of some of the different types of IVS motion patterns to illustrate the differences between them. Although the images presented were acquired with cardiac magnetic resonance imaging, the same kinds of IVS motion patterns can also be observed with other imaging methods, such as echocardiography. Online Videos 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, and 15 accompany the selected frames shown in Figures 1, 2, 3, 4, and 5⇓⇓⇓⇓⇓, and Online Figures 1 and 2.
For supplemental figures and videos, please see the online version of this paper.
Both authors have reported that they have no relationships relevant to the contents of this paper to disclose.
- Received May 5, 2017.
- Revision received June 8, 2017.
- Accepted June 13, 2017.
- 2017 American College of Cardiology Foundation