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Related Concept Videos

Thermal Strain01:19

Thermal Strain

2.8K
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...
2.8K
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

960
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...
960
Stress-Strain Diagram01:10

Stress-Strain Diagram

2.4K
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...
2.4K
Transformation of Plane Strain01:12

Transformation of Plane Strain

513
When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
513

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Related Experiment Video

Updated: Jan 28, 2026

Magnetic Resonance Derived Myocardial Strain Assessment Using Feature Tracking
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Magnetic Resonance Derived Myocardial Strain Assessment Using Feature Tracking

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Myocardial Strain and Dyssynchrony: Incremental Value?

Flemming J Olsen1, Tor Biering-Sørensen1

  • 1Gentofte Hospital, Department of Cardiology, Niels Andersens Vej 65, Hellerup 2900, Denmark.

Heart Failure Clinics
|March 6, 2019
PubMed
Summary
This summary is machine-generated.

Heart failure (HF) is a growing public health concern. Echocardiographic strain imaging offers new insights into HF with preserved ejection fraction, potentially guiding future treatments and clinical trials.

Keywords:
DyssynchronyHeart failureSpeckle trackingStrain

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High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart
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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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Area of Science:

  • Cardiology
  • Medical Imaging

Background:

  • Heart failure (HF) represents a significant global health challenge with distinct management strategies for reduced ejection fraction (HFrEF) versus preserved ejection fraction (HFpEF).
  • Current prognostic markers and treatments primarily focus on HFrEF, leaving a gap in targeted therapies for HFpEF.
  • Echocardiographic deformation imaging, specifically strain analysis, is emerging as a valuable tool in understanding HF pathophysiology.

Purpose of the Study:

  • To explore the role of echocardiographic deformation imaging (strain imaging) in characterizing heart failure, particularly HFpEF.
  • To highlight the potential of strain imaging to provide prognostic information and guide future research and treatment strategies.

Main Methods:

  • Utilizing speckle tracking echocardiography to assess myocardial strain.
  • Analyzing strain parameters to characterize pathophysiologic aspects of HFpEF.
  • Reviewing existing literature on strain imaging in HF management.

Main Results:

  • Strain imaging reveals novel pathophysiologic insights into HFpEF.
  • Certain HF medications show potential to improve strain measures in HFpEF patients.
  • Speckle tracking echocardiography provides valuable prognostic information for HF patients.

Conclusions:

  • Strain imaging holds promise for optimizing HF treatment by elucidating underlying mechanisms.
  • This technique can facilitate the design of novel clinical trials for HFpEF.
  • Strain imaging may lead to the development of new therapeutic opportunities for heart failure patients.