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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...
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Shearing Strain01:20

Shearing Strain

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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

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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...
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Characteristics of Practical Op Amps01:16

Characteristics of Practical Op Amps

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A difference amplifier, a crucial component in numerous electronic devices, ideally amplifies only the difference-mode signal, which is the difference between two input signals. However, in practical circuits, the output voltage depends on both the differential gain and the common-mode gain.
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Theoretical Foundations of Nursing Practice01:30

Theoretical Foundations of Nursing Practice

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Theories play an essential role in organizing patient care. Theories refer to a proposed or followed belief, policy, or procedure that is the basis for action. Nursing theories are knowledge-based concepts that guide nurses' actions, influence nursing education and practice, and allow nurses to care for their patients.
Theories provide a perspective to assess patients' conditions and organize data and methods. They also assist in analyzing and interpreting information. They represent a...
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Strain Energy01:13

Strain Energy

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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...
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Related Experiment Video

Updated: Jan 25, 2026

Comprehensive Echocardiographic Assessment of Right Ventricle Function in a Rat Model of Pulmonary Arterial Hypertension
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Echocardiographic Strain in Clinical Practice.

Siddharth J Trivedi1, Mikhail Altman1, Tony Stanton2

  • 1Westmead Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia; Department of Cardiology, Westmead Hospital, Sydney, NSW, Australia.

Heart, Lung & Circulation
|May 9, 2019
PubMed
Summary

Left ventricular (LV) ejection fraction is a limited measure of heart function. Myocardial strain analysis offers a more sensitive method for assessing LV function, aiding in early diagnosis and prognosis of cardiovascular conditions.

Keywords:
EchocardiographyGlobal longitudinal strainLeft ventricular functionSpeckle tracking

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Area of Science:

  • Cardiology
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Accurate left ventricular (LV) function evaluation is crucial for cardiovascular disease management, therapy monitoring, and risk stratification.
  • LV ejection fraction (LVEF), the standard global systolic function measure, has limitations in detecting subtle functional changes.
  • Early detection of subclinical LV dysfunction is vital for timely therapeutic intervention.

Purpose of the Study:

  • To review the methodological aspects of myocardial strain analysis.
  • To explore the diagnostic utility of strain analysis in various cardiovascular conditions.
  • To summarize the prognostic value of strain analysis in clinical practice.

Main Methods:

  • Review of current literature on myocardial strain imaging techniques.
  • Analysis of studies utilizing strain analysis for LV function assessment.
  • Synthesis of data on the application of strain analysis in different cardiomyopathies and cardiac diseases.

Main Results:

  • Strain analysis provides a more sensitive assessment of myocardial deformation compared to LVEF.
  • Strain analysis aids in identifying regional variations in myocardial function, crucial for specific cardiomyopathies.
  • Its utility in detecting early subclinical LV dysfunction and monitoring therapeutic response is increasingly recognized.

Conclusions:

  • Myocardial strain analysis is a valuable, sensitive tool for evaluating LV function beyond LVEF.
  • Strain analysis enhances diagnostic accuracy and prognostic stratification in cardiovascular medicine.
  • Further integration of strain analysis into clinical practice is warranted for improved patient outcomes.