Related Experiment Video
Updated: Aug 14, 2025
14:14
Quantification of Strain in a Porcine Model of Skin Expansion Using Multi-View Stereo and Isogeometric Kinematics
Published on: April 16, 2017
11.7K
Global Longitudinal Strain in Wellens' Syndrome
Rakesh Agarwal1, Aditya Verma2
1Department of Cardiology, Vedant Hospital, Thane, Maharashtra, India.
Journal of Cardiovascular Echography
|January 9, 2023
Summary
Wellens' syndrome, a cause of noncardiac chest pain, shows early left ventricular global longitudinal strain changes. These cardiac imaging findings appear even with normal ejection fraction, aiding diagnosis and treatment.
Area of Science:
- Cardiology
- Medical Imaging
Background:
- Noncardiac chest pain is a common presentation.
- Wellens' syndrome is a specific electrocardiographic pattern indicating critical proximal left anterior descending coronary artery stenosis.
Observation:
- A young male patient presented with chest pain initially considered noncardiac.
- Early changes in left ventricular global longitudinal strain were observed.
Findings:
- Wellens' syndrome was diagnosed based on characteristic clinical and imaging findings.
- Global longitudinal strain alterations were detected despite a preserved ejection fraction.
- Percutaneous coronary intervention was successfully performed.
Implications:
- Global longitudinal strain imaging can reveal subclinical myocardial dysfunction in Wellens' syndrome.
- Early identification of Wellens' syndrome is crucial for timely intervention.
- This case highlights the importance of considering cardiac causes for chest pain.
More Related Videos
Related Concept Videos
01:12Transformation of Plane Strain
226
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...
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
226
01:20Normal Strain under Axial Loading
609
Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
609
01:14Bending of Curved Members - Strain Analysis
170
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...
The important part of bending analysis for such a member...
170
01:16Flexural Stress
337
When analyzing bending in symmetric members, it's crucial to understand how stresses distribute when subjected to bending moments. This stress distribution is effectively described by applying fundamental mechanics and material science principles, particularly Hooke's Law for elastic materials.
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to...
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to...
337
01:15Stress: General Loading Conditions
360
To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
360
01:20Shearing Strain
564
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...
564