interventricular septum
The muscular wall separating the left and right ventricles of the heart, measured for thickness and motion assessment.
Full Definition
The interventricular septum (IVS) is the muscular partition that divides the left and right ventricles of the heart. In cardiac imaging, septal thickness is routinely measured in diastole, with normal values typically ranging from 6-11 mm. The septum contributes significantly to left ventricular systolic function through its contractile motion toward the left ventricular free wall. Abnormalities include septal hypertrophy (as seen in hypertrophic cardiomyopathy), septal defects (ventricular septal defects), and motion abnormalities such as paradoxical septal motion seen in right heart pressure overload or post-cardiac surgery. Septal assessment is crucial in diagnosing various cardiac conditions and planning interventional procedures.
Usage
Usage note: Always specify measurement location and timing (diastolic for thickness); distinguish from atrial septum.
In Context
- "The interventricular septum measured 15 mm, suggesting septal hypertrophy." — Echocardiography report
- "Normal interventricular septum motion was observed throughout the cardiac cycle." — Cardiac MRI report