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Related Concept Videos

Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

637
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
637
Bending of Curved Members - Strain Analysis01:14

Bending of Curved Members - Strain Analysis

537
The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member...
537
Thermal Strain01:19

Thermal Strain

2.9K
Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
2.9K
Shearing Strain01:20

Shearing Strain

1.5K
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between the...
1.5K
Measurements of Strain01:27

Measurements of Strain

2.6K
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
2.6K
Strain Energy01:13

Strain Energy

1.0K
Strain energy is a fundamental concept in the field of materials science and structural engineering, describing the energy absorbed by a material or structure when it is deformed under load.
Consider a rod that is fixed at one end and subjected to an axial force at the free end. This axial force induces stress within the rod, leading to its elongation. As the axial force increases, so does the elongation of the rod, illustrating a direct relationship between the force applied and the resulting...
1.0K

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Related Experiment Video

Updated: Feb 13, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
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Left atrial function: evaluation by strain analysis.

Gary C H Gan1,2, Aaisha Ferkh3, Anita Boyd3,4

  • 1Department of Cardiology, Blacktown Hospital, Blacktown, NSW, Australia.

Cardiovascular Diagnosis and Therapy
|March 16, 2018
PubMed
Summary
This summary is machine-generated.

Left atrial function, assessed using strain analysis, is a valuable biomarker for cardiovascular disease. This method evaluates myocardial deformation and offers prognostic insights beyond traditional size measurements.

Keywords:
LA longitudinal strainLeft atrial strain (LA strain)left atrial function (LA function)strain echocardiography

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Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Imaging

Background:

  • The left atrium (LA) plays a critical role in left ventricular filling and serves as a biomarker for cardiovascular disease.
  • Traditionally, LA size was used, but LA function is now increasingly evaluated, independently and with size, for prognostic value.

Purpose of the Study:

  • To review strain analysis techniques for evaluating left atrial (LA) function.
  • To examine alterations in LA strain in various physiological and pathological conditions.
  • To assess the utility of LA strain as a prognostic marker.

Main Methods:

  • Focus on various types of strain analysis for LA function evaluation.
  • Analysis of LA strain in physiological and pathological states.
  • Evaluation of LA strain as a prognostic marker.

Main Results:

  • Strain analysis measures myocardial deformation throughout the cardiac cycle.
  • Strain rate examines the rate of change in myocardial deformation.
  • LA strain alterations reflect changes in LA function.

Conclusions:

  • Left atrial strain analysis provides comprehensive evaluation of LA reservoir, conduit, and contractile function.
  • LA strain is a promising biomarker for cardiovascular disease and adverse outcomes.
  • Strain analysis offers valuable prognostic information in cardiovascular medicine.