Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Wechsler's Contribution to Measures of Intelligence01:23

Wechsler's Contribution to Measures of Intelligence

1.6K
David Wechsler, a psychologist who worked with World War I veterans, developed a significant IQ test in 1939 called the Wechsler-Bellevue Intelligence Scale. This test was innovative because it combined several subtests that measured both verbal and nonverbal skills, reflecting Wechsler's belief that intelligence is a global capacity involving purposeful action, rational thinking, and effective interaction with the environment. This test later evolved into the Wechsler Adult Intelligence...
1.6K
Wilcoxon Rank-Sum Test01:21

Wilcoxon Rank-Sum Test

311
The Wilcoxon rank-sum test, also known as the Mann-Whitney U test, is a nonparametric test used to determine if there is a significant difference between the distributions of two independent samples. This test is designed specifically for two independent populations and has the following key requirements:
311
Weir: Problem Solving01:26

Weir: Problem Solving

95
Water flow in open channels is often measured using hydraulic structures such as weirs, which allow precise calculation of discharge. In a rectangular channel, flow rates are measured using three types of weirs: rectangular sharp-crested, triangular sharp-crested, and broad-crested. The weir head is set at a fixed height above the channel bottom, simplifying calculations and enabling the relationship between depth and flow rate to be analyzed.For the rectangular sharp-crested weir, the flow...
95
Weir01:24

Weir

113
A weir is a hydraulic structure designed to partially obstruct an open channel, enabling precise control and measurement of water flow. By forcing water to flow over or through it, a weir allows for accurate determination of discharge rates, making it an essential tool in water resource management. These structures are extensively used in regulating river flows, irrigation systems, and flood control channels.Types of Weirs and Their FeaturesWeirs are categorized primarily into sharp-crested and...
113
Wilcoxon Signed-Ranks Test for Matched Pairs01:09

Wilcoxon Signed-Ranks Test for Matched Pairs

203
The Wilcoxon signed-rank test for matched pairs evaluates the null hypothesis by combining the ranks of differences with their signs. It essentially tests whether the median of the differences in a population of matched pairs is zero. Since the test incorporates more information than the sign test, it generally yields more trustable conclusions. This test also does not require the data to follow a normal distribution, but two conditions must be met for it to be applicable: (1) the data must...
203
Kendall's Coefficient of Concordance01:20

Kendall's Coefficient of Concordance

497
Kendall's Coefficient of Concordance (W), also known as Kendall's W, is a non-parametric statistical measure used to assess the agreement or concordance between multiple raters or judges when they rank a set of items. It is often used when you have ordinal data (ranks) and you want to see if there is consistency or consensus among the raters. It is widely applied in research areas such as psychology, medicine, and social sciences, where multiple judges are asked to rank or rate subjects...
497

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Mavacamten in Obstructive Hypertrophic Cardiomyopathy and C282Y Homozygous Hereditary Hemochromatosis: A First-in-Human Report.

JACC. Case reports·2026
Same author

Reporting bias is prevalent in systematic reviews and meta-analyses related to endoscopic <i>vs.</i> microscopic decompression: a systematic review and meta-analysis.

Journal of spine surgery (Hong Kong)·2026
Same author

Long-Term Impact of Total Hip Arthroplasty on Subsequent Lumbar Spine Surgery in Patients with Hip-Spine Disease: A Nationwide Analysis of Risk Factors and Outcomes.

Global spine journal·2025
Same author

Long-Term Outcomes of Cervical Disc Replacement and Anterior Cervical Discectomy and Fusion: A Review of FDA IDE Trials With Real-World Comparison.

Global spine journal·2025
Same author

Response to "Letter to the Editor: Anticoagulation Risk Stratification and Methodological Considerations in Immediate Mobilization After Atrial Fibrillation Ablation".

Journal of cardiovascular electrophysiology·2025
Same author

Chemoprevention of Barrett's Esophagus: a Systematic Review and Comprehensive Assessment of Bias.

Diseases of the esophagus : official journal of the International Society for Diseases of the Esophagus·2025

Related Experiment Video

Updated: Aug 28, 2025

Single Wavelength Shadow Imaging of Caenorhabditis elegans Locomotion Including Force Estimates
08:41

Single Wavelength Shadow Imaging of Caenorhabditis elegans Locomotion Including Force Estimates

Published on: April 18, 2014

9.3K

How Well Do We Know Wellens?

Riya Sam1, Zain Jafri2, Muftawu-Deen Iddrisu1

  • 1Internal Medicine, Advocate Illinois Masonic Medical Center, Chicago, USA.

Cureus
|September 15, 2022
PubMed
Summary
This summary is machine-generated.

Wellens syndrome, characterized by specific EKG T-wave changes, indicates critical left anterior descending artery stenosis. Early recognition and intervention are vital to prevent mortality from this under-recognized condition.

Keywords:
acute st elevation myocardial infarctionatypical chest painekg abnormalitieslad occlusionwellens

More Related Videos

Combining Computer Game-Based Behavioural Experiments With High-Density EEG and Infrared Gaze Tracking
13:40

Combining Computer Game-Based Behavioural Experiments With High-Density EEG and Infrared Gaze Tracking

Published on: December 16, 2010

16.8K
Automated Behavioral Analysis of Large C. elegans Populations Using a Wide Field-of-view Tracking Platform
07:20

Automated Behavioral Analysis of Large C. elegans Populations Using a Wide Field-of-view Tracking Platform

Published on: November 28, 2018

9.3K

Related Experiment Videos

Last Updated: Aug 28, 2025

Single Wavelength Shadow Imaging of Caenorhabditis elegans Locomotion Including Force Estimates
08:41

Single Wavelength Shadow Imaging of Caenorhabditis elegans Locomotion Including Force Estimates

Published on: April 18, 2014

9.3K
Combining Computer Game-Based Behavioural Experiments With High-Density EEG and Infrared Gaze Tracking
13:40

Combining Computer Game-Based Behavioural Experiments With High-Density EEG and Infrared Gaze Tracking

Published on: December 16, 2010

16.8K
Automated Behavioral Analysis of Large C. elegans Populations Using a Wide Field-of-view Tracking Platform
07:20

Automated Behavioral Analysis of Large C. elegans Populations Using a Wide Field-of-view Tracking Platform

Published on: November 28, 2018

9.3K

Area of Science:

  • Cardiology
  • Diagnostic Electrocardiography

Background:

  • Wellens syndrome is a critical indicator of left anterior descending artery (LAD) stenosis.
  • It is often under-recognized, posing a significant mortality risk if not treated promptly.

Observation:

  • An elderly woman presented with atypical chest pain and a non-ischemic EKG.
  • Echocardiogram revealed apical akinesis and deformity; prior EKG showed Type 1 Wellens' sign.

Findings:

  • Emergent coronary angiogram confirmed critical 99% LAD stenosis.
  • Successful percutaneous coronary intervention (PCI) with drug-eluting stents was performed.

Implications:

  • This case highlights the importance of recognizing Wellens' sign for timely diagnosis of critical LAD stenosis.
  • Prompt PCI can significantly improve outcomes in patients with Wellens syndrome.