Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Keystone Species

Keystone Species

Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a...

Protein Folding

Protein Folding

The Bohr Model

The Bohr Model

Following the work of Ernest Rutherford and his colleagues in the early twentieth century, the picture of atoms consisting of tiny dense nuclei surrounded by lighter and even tinier electrons continually moving about the nucleus was well established. This picture was called the planetary model since it pictured the atom as a miniature “solar system” with the electrons orbiting the nucleus like planets orbiting the sun. The simplest atom is hydrogen, consisting of a single proton as the...

Phase Transitions: Melting and Freezing

Phase Transitions: Melting and Freezing

Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...

What is Conservation Biology?

What is Conservation Biology?

Conservation biology is a scientific field that focuses on the preservation of biodiversity in order to protect ecosystems while meeting the needs of the human population. Humans require properly functioning ecosystems to maintain our supply of natural resources, including food, medicines, and building materials.

Bacterial RNA Polymerase

Bacterial RNA Polymerase

Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...

You might also read

Related Articles

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

Sort by

Same author

HPV Testing Versus Cytology for Cervical Cancer Screening Among Women 50 Years and Older: Evidence From the HPV FOCAL Randomized Controlled Trial.

International journal of cancer·2026

Same author

Long-term outcome of patients with rectal cancer following transanal endoscopic microsurgery: Real-world insights from a single-center audit.

Current problems in surgery·2026

Same author

Exercise treadmill testing for efficacy evaluation in randomized, controlled trials.

American heart journal·2026

Same author

A global image-based data repository of killer whale interactions with elasmobranchs.

Scientific data·2026

Same author

Outcomes after arthroscopically assisted lower trapezius transfer for irreparable posterosuperior rotator cuff tears.

Journal of shoulder and elbow surgery·2025

Same author

There and back again: navigating disordered eating and body dysmorphia as a pre-professional ballet dancer.

British journal of sports medicine·2025

Same journal

Is there evidence that intranasal ketamine can provide adequate procedural sedation in paediatric patients?

Emergency medicine journal : EMJ·2026

Same journal

Consensus-based definition of paediatric out-of-hospital clinical deterioration: a modified delphi study.

Emergency medicine journal : EMJ·2026

Same journal

Parents' and children's experiences of prehospital care after a child's head injury: a qualitative study.

Emergency medicine journal : EMJ·2026

Same journal

Nurse-delivered intravenous opioids in UK emergency departments: implications for pain standards and practice.

Emergency medicine journal : EMJ·2026

Same journal

Are high doses of naloxone required for nitazene overdoses?

Emergency medicine journal : EMJ·2026

Same journal

A cold, blue leg.

Emergency medicine journal : EMJ·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Feb 13, 2026

Visualizing Axonal Growth Cone Collapse and Early Amyloid β Effects in Cultured Mouse Neurons

Visualizing Axonal Growth Cone Collapse and Early Amyloid β Effects in Cultured Mouse Neurons

Published on: October 30, 2018

Collapse in the scrum.

David Donnelly¹, David Patrick¹, Robin A Weir²

¹Emergency Department, Hairmyres Hospital, East Kilbride, UK.

Emergency Medicine Journal : EMJ

|March 7, 2018

Summary

This summary is machine-generated.

A young athlete experienced sudden collapse and cardiac arrest during sports. Frequent ventricular extrasystoles suggest an underlying arrhythmogenic condition requiring prompt diagnosis.

Keywords:

acute care cardiac care arrythmia cardiac care diagnosis

More Related Videos

Identification of Fatty Acids in Bacillus cereus

Identification of Fatty Acids in Bacillus cereus

Published on: December 5, 2016

Human Colonoid Monolayers to Study Interactions Between Pathogens, Commensals, and Host Intestinal Epithelium

Human Colonoid Monolayers to Study Interactions Between Pathogens, Commensals, and Host Intestinal Epithelium

Published on: April 9, 2019

Related Experiment Videos

Last Updated: Feb 13, 2026

Visualizing Axonal Growth Cone Collapse and Early Amyloid β Effects in Cultured Mouse Neurons

Visualizing Axonal Growth Cone Collapse and Early Amyloid β Effects in Cultured Mouse Neurons

Published on: October 30, 2018

Identification of Fatty Acids in Bacillus cereus

Identification of Fatty Acids in Bacillus cereus

Published on: December 5, 2016

Human Colonoid Monolayers to Study Interactions Between Pathogens, Commensals, and Host Intestinal Epithelium

Human Colonoid Monolayers to Study Interactions Between Pathogens, Commensals, and Host Intestinal Epithelium

Published on: April 9, 2019

Area of Science:

Cardiology
Sports Medicine
Genetics

Background:

A 17-year-old male presented with witnessed collapse and respiratory arrest during rugby.
He had a history of syncope and a paternal family history of sudden cardiac death.

Observation:

The patient was alert on arrival with normal vital signs and physical examination.
Paramedics noted frequent ventricular extrasystoles on initial assessment.
An initial ECG was recorded (Figure 1).

Findings:

The differential diagnosis includes pulmonary embolism, hypertrophic obstructive cardiomyopathy, arrhythmogenic right ventricular cardiomyopathy, and right ventricular outflow tract tachycardia.
The presentation suggests a primary electrical abnormality or structural heart disease exacerbated by exertion.

Implications:

Early and accurate diagnosis is crucial for preventing recurrent events and sudden cardiac death in young athletes.
Genetic counseling and screening may be indicated given the family history.
Further diagnostic workup is necessary to determine the definitive cause of the collapse.