It is defined as – change in the length to the original length of an object. We use cookies to ensure that we give you the best experience on our website. Strain rate is the speed of deformation, i.e. Speckle is the term for the structures that the myocardium displays on the ultrasound image. However, speckle tracking offers a lower temporal resolution, which makes the method poorer in the setting of tachycardia (precision is reduced at high heart rate) and when studying speckles located remotely (from the transducer).

Longitudinal strain: If there is a change in the length of a body due to the applied force, then the strain is called longitudinal strain. What is the difference between Titanium vs Aluminum, Fusion 360 vs SolidWorks : What is the Difference, Best 3D Printer Software : Slicer Software. As can be seen here, septal parts (yellow arrow and yellow-marked myocardium) are activated before the lateral ones (red arrow and red marked myocardium). Poisson’s ratio: The ratio of lateral strain to that of the longitudinal strain is termed as poisson’s ratio and it is represented by ϻ or 1/m. If you continue to use this site we will assume that you are happy with it.

The strain on its own is defined as the change in dimension (length, breadth, area…) divided by the original dimension. Das TDI erlaubt eine hohe zeitliche Auflösung und kann auch bei Patienten mit eingeschränkten Schallbedingungen relativ zuverlässig angewendet werden. Die Werte der Myokarddeformation in der Diastole bei einem normalem Herzen liegen hier zwischen 1,3 und 1,7/s. This article covers what is strain in mechanics?