GLS Flashcards
(11 cards)
What types of fibers are found in the myocardium?
Oblique fibers, circumferential fibers, longitudinal fibers
These fibers contribute to the structural and functional properties of the heart muscle.
How is strain defined in relation to myocardial deformation?
Overall deformation of an object
Strain is an important measure in assessing the mechanical properties of myocardial tissue.
What is the formula for calculating strain?
strain% = (Length - Original Length) / Original Length
This formula quantifies how much an object has deformed relative to its original size.
What is the minimum normal strain value for basal segments?
-10%
This indicates the threshold for healthy myocardial strain in basal segments.
What is the minimum normal strain value for mid segments?
-15%
This value helps in assessing myocardial function in mid segments.
What is the minimum normal strain value for apical segments?
-20%
This threshold is crucial for evaluating the function of apical segments.
What is the normal global longitudinal strain range?
-17% to -26%
This range indicates healthy global myocardial function.
Describe the characteristics of normal strain waveforms.
Uniform and group together, peak strains occur near aortic valve closure
This pattern is important for understanding cardiac mechanics.
What are the observed changes in the left ventricle in cardiac amyloidosis?
Basal and mid sections are reduced, tissue appears very speckled
These characteristics are indicative of amyloid infiltration affecting cardiac function.
What does longitudinal strain assess?
It assesses apical mid and basal sections in each apical view
This method is key for evaluating the heart’s pumping efficiency.
True or False: Strain is calculated as the change in length divided by the original length.
True
This relationship defines the concept of strain in biomechanics.
