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

Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

800
Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
800
Electrocardiogram01:29

Electrocardiogram

7.6K
An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
7.6K
Cardiac Action Potential01:30

Cardiac Action Potential

8.4K
Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
8.4K
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

887
Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
887
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

1.9K
Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
1.9K
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

3.5K
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
3.5K

You might also read

Related Articles

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

Sort by
Same author

Correlation Between Oncotype DX, PREDICT and the Nottingham Prognostic Index: Implications for the Management of Early Breast Cancer.

Cureus·2020
Same author

The Utility of Oncotype DX for Adjuvant Chemotherapy Treatment Decisions in Estrogen Receptor-positive, Human Epidermal Growth Factor Receptor 2-negative, Node-negative Breast Cancer.

Cureus·2020
Same author

An 81 Year Old with Back Pain.

Annals of medicine and surgery (2012)·2016
Same author

Beyond weight loss: evaluating the multiple benefits of bariatric surgery after Roux-en-Y gastric bypass and adjustable gastric band.

Obesity surgery·2013
Same author

SERCA2a gene transfer decreases sarcoplasmic reticulum calcium leak and reduces ventricular arrhythmias in a model of chronic heart failure.

Circulation. Arrhythmia and electrophysiology·2011
Same author

Ultrasound and MRI findings in appendicular and truncal fat necrosis.

Skeletal radiology·2007
Same journal

Erratum: Analgesic effectiveness of ultrasound-guided unilateral erector spine block versus paravertebral block for postoperative management among adult patients undergoing upper abdominal surgery: a prospective cohort study: erratum.

Annals of medicine and surgery (2012)·2026
Same journal

Expanding congenital Zika syndrome: normocephalic infants with neurological and visual deficits.

Annals of medicine and surgery (2012)·2026
Same journal

Nanoparticle-delivered immunomodulators targeting blood-brain barrier disruption in fulminant adult-onset ADEM.

Annals of medicine and surgery (2012)·2026
Same journal

Assessment of pembrolizumab in advanced endometrial carcinoma: a letter to the editor.

Annals of medicine and surgery (2012)·2026
Same journal

Anti-Jka-mediated delayed hemolytic transfusion reaction mimicking warm autoimmune hemolytic anemia in a multiparous woman: a case report.

Annals of medicine and surgery (2012)·2026
Same journal

Assessment of hydrosodic balance by impedancemetry in intensive care: a monocentric prospective study, the EBaHIR study.

Annals of medicine and surgery (2012)·2026
See all related articles

Related Experiment Video

Updated: Mar 24, 2026

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
18:11

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis

Published on: December 28, 2012

24.9K

68-Year-Old Man with PR Bleed.

Sukhpreet S Dubb1, Joanna M Farrant2, B V Praveen3

  • 1Broomfield Hospital, Essex.

Annals of Medicine and Surgery (2012)
|March 16, 2016
PubMed
Summary
This summary is machine-generated.

A 68-year-old man presented with significant weight loss and changes in bowel habits, including loose stools and rectal bleeding. Further investigation is warranted to determine the cause of these concerning symptoms.

Keywords:
Faecal occult bloodInvestigationsPR bleeding

More Related Videos

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
10:17

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Published on: April 11, 2025

2.1K
Optimization of Transesophageal Atrial Pacing to Assess Atrial Fibrillation Susceptibility in Mice
08:05

Optimization of Transesophageal Atrial Pacing to Assess Atrial Fibrillation Susceptibility in Mice

Published on: June 29, 2022

3.7K

Related Experiment Videos

Last Updated: Mar 24, 2026

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
18:11

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis

Published on: December 28, 2012

24.9K
Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
10:17

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Published on: April 11, 2025

2.1K
Optimization of Transesophageal Atrial Pacing to Assess Atrial Fibrillation Susceptibility in Mice
08:05

Optimization of Transesophageal Atrial Pacing to Assess Atrial Fibrillation Susceptibility in Mice

Published on: June 29, 2022

3.7K

Area of Science:

  • Gastroenterology
  • Colorectal Medicine
  • Oncology

Background:

  • A 68-year-old male patient exhibits alarming symptoms including a 10 kg weight loss over two months.
  • The patient reports experiencing loose bowel motions and intermittent rectal bleeding, suggestive of gastrointestinal pathology.

Purpose of the Study:

  • To outline the appropriate next steps in the clinical evaluation of a patient presenting with potential colorectal symptoms.
  • To guide healthcare professionals in diagnosing the cause of unexplained weight loss and altered bowel habits.

Main Methods:

  • Review of patient's presenting symptoms: significant weight loss, loose stools, and rectal bleeding.
  • Consideration of initial investigations: full blood count and fecal occult blood test.
  • Clinical decision-making regarding further diagnostic procedures in a colorectal clinic setting.

Main Results:

  • The presented case highlights a patient profile requiring urgent and thorough gastrointestinal investigation.
  • Initial laboratory results (full blood count, fecal occult blood test) are available for review.

Conclusions:

  • The constellation of symptoms necessitates a prompt and comprehensive diagnostic workup to rule out serious underlying conditions.
  • Further clinical assessment and investigations are crucial to establish a definitive diagnosis and initiate appropriate management.