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Related Concept Videos

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

1.4K
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...
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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
Problem Solving on Stress and Strain01:22

Problem Solving on Stress and Strain

2.0K
Stress is a quantity that describes the magnitude of a force that causes deformation, generally defined as internal force per unit area. When forces pull on an object and cause its elongation, like the stretching of an elastic band, it is called tensile stress. When forces cause the compression of an object, it is known as compressive stress. When an object is being squeezed uniformly from all sides, like a submarine in the depths of the ocean, we call this kind of stress bulk stress (or volume...
2.0K
Stress-Strain Diagram01:10

Stress-Strain Diagram

2.5K
A stress-strain diagram is a crucial tool that graphically displays a material's mechanical characteristics. This diagram is derived from a tensile test performed on a carefully prepared cylindrical specimen. The specimen has two gauge marks inscribed on its central part, and the distance between these marks is known as the gauge length. The cylindrical specimen is placed in a testing machine, which applies an increasing centric load. As this load grows, so does the gauge length. This...
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Related Experiment Video

Updated: Feb 7, 2026

Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging
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Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging

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An introduction to left ventricular strain.

Akhil Narang1, Karima Addetia

  • 1University of Chicago, Chicago, Illinois, USA.

Current Opinion in Cardiology
|July 18, 2018
PubMed
Summary
This summary is machine-generated.

Left ventricular strain analysis offers a more robust assessment of heart function compared to ejection fraction. This advanced echocardiography technique improves the detection of subclinical dysfunction and provides greater prognostic value.

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Related Experiment Videos

Last Updated: Feb 7, 2026

Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging
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Evaluation of Left Ventricular Structure and Function using 3D Echocardiography
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Transthoracic Speckle Tracking Echocardiography for the Quantitative Assessment of Left Ventricular Myocardial Deformation
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Area of Science:

  • Cardiology
  • Medical Imaging
  • Echocardiography

Background:

  • Two-dimensional echocardiography conventionally assesses left ventricular function using ejection fraction.
  • Left ventricular ejection fraction (LVEF) has limitations including poor reproducibility and inability to detect subclinical dysfunction.

Purpose of the Study:

  • To review the definition, acquisition, and measurement of left ventricular strain.
  • To compare the advantages and prognostic value of strain analysis over LVEF.
  • To examine the challenges and future directions of strain imaging.

Main Methods:

  • Review of contemporary research and guidelines on left ventricular strain.
  • Analysis of studies establishing normal values and prognostic benefits of strain assessment.
  • Examination of strain imaging acquisition and measurement techniques.

Main Results:

  • Left ventricular strain analysis emerges as a robust method for assessing cardiac function.
  • Strain analysis demonstrates advantages over LVEF in reproducibility and detection of subclinical dysfunction.
  • Strain assessment offers incremental prognostic value in cardiovascular evaluation.

Conclusions:

  • Left ventricular strain imaging represents a significant advancement over traditional LVEF measurements.
  • Standardization efforts are enhancing the clinical utility of strain analysis.
  • Strain imaging holds promise for improved diagnosis and management of heart conditions.