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

Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs01:20

Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs

252
Body:Bioequivalence experimental study designs are crucial methodologies used in evaluating and comparing the bioavailability of different drug products. These designs are categorized into various types: completely randomized, randomized block, repeated measures, cross and carry-over, and Latin square designs.Completely randomized designs involve randomly allocating treatments to all subjects participating in the experiment. This allocation is achieved by assigning unique random numbers to...
252
Anatomy of the Heart01:27

Anatomy of the Heart

119.8K
The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.
119.8K
Anatomy of the Heart01:20

Anatomy of the Heart

3.1K
The heart is a hollow, muscular organ approximately the size of a fist, consisting of four chambers. It is enclosed in the pericardium, a fibrous sac with two layers: the visceral and parietal pericardium, separated by a fluid-filled space containing serous fluid to reduce friction.
The heart has three layers: the innermost endocardium, the muscular myocardium, and the outer epicardium, all working together for optimal cardiac function.
Chambers of the Heart
The heart is made up of four...
3.1K
Block Diagram Reduction01:22

Block Diagram Reduction

561
The process of deriving the transfer function of a control system often involves reducing its block diagram to a single block. This simplification can be achieved through a series of strategic operations, including relocating branch points and comparators. These operations preserve the overall function of the system while allowing for easier manipulation and combination of blocks.
The first step in this process is the identification and relocation of a branch point. A branch point, where a...
561
Elements of Block Diagrams01:25

Elements of Block Diagrams

705
Block diagrams serve as a visual representation of the input-output relationships within a system. An illustrative example is a heating system, where the set temperature activates the furnace to warm the room to the desired level. Block diagrams are versatile, modeling linear systems through Laplace transform variables and nonlinear systems using time domain variables.
A block diagram typically includes essential elements such as comparators, blocks, and feedback loops. Each of these elements...
705
Chronic Pharyngitis01:23

Chronic Pharyngitis

11.9K
Chronic pharyngitis refers to persistent inflammation of the pharyngial mucosa.
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
11.9K

You might also read

Related Articles

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

Sort by
Same author

The Role of Phosphodiesterase-5 Enzyme Inhibitors and Prostacyclin Analogs in Reactive Pulmonary Vasculopathy in Systolic Heart Failure: A Narrative Review.

Cureus·2025
Same author

Management of Hypertension and Associated Comorbidities: An Expert Consensus Statement from India.

The Journal of the Association of Physicians of India·2025
Same author

Cardiac Conduction Defects Induced by Paracetamol Overdose: A Rare Case.

Cureus·2025
Same author

Optimizing the Diagnosis and Management of Nocturnal Hypertension: An Expert Consensus from India.

The Journal of the Association of Physicians of India·2025
Same author

Temporal Trends in Mortality Related to Hyperthyroidism and Heart Failure in the United States.

Cureus·2025
Same author

Expert Consensus on Lifestyle Modifications in Hypertension Management: An Indian Perspective.

The Journal of the Association of Physicians of India·2025
Same journal

Providers' Perspectives on Hospital-Based Tobacco Treatment Efforts.

The American journal of the medical sciences·2026
Same journal

In Memoriam: Maurice A. Mufson, MD, MACP.

The American journal of the medical sciences·2026
Same journal

Outcomes of Acute Myeloid Leukemia Patients Admitted to the Intensive Care Unit within 100 days of Allogeneic Hematopoietic Stem Cell Transplantation.

The American journal of the medical sciences·2026
Same journal

Association Between Reverse Triiodothyronine and Cardiac Complications in Patients with Uncontrolled Graves' Disease.

The American journal of the medical sciences·2026
Same journal

Chlorthalidone vs. hydrochlorothiazide in hypertension management: Lessons for guiding clinical practice.

The American journal of the medical sciences·2026
Same journal

The impact of COVID-19 on alcohol-associated hepatitis and alcohol-associated cirrhosis.

The American journal of the medical sciences·2026
See all related articles

Related Experiment Video

Updated: Feb 1, 2026

Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine
10:08

Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine

Published on: February 17, 2018

14.0K

Complete Heart Block From Chronic Marijuana Use.

Priyam Mithawala1, Priyank Shah2, Edward Koomson3

  • 1Department of Pharmacy Practice, Presbyterian College School of Pharmacy, Clinton, South Carolina.

The American Journal of the Medical Sciences
|December 12, 2018
PubMed
Summary
This summary is machine-generated.

Chronic marijuana use can lead to severe heart problems, including complete heart block. This case highlights the need for awareness of advanced conduction system abnormalities in patients using marijuana.

Keywords:
Conduction system abnormalitiesHeart blockMarijuana

More Related Videos

Implantation of Total Artificial Heart in Congenital Heart Disease
07:27

Implantation of Total Artificial Heart in Congenital Heart Disease

Published on: July 18, 2014

25.2K
Induction and Phenotyping of Acute Right Heart Failure in a Large Animal Model of Chronic Thromboembolic Pulmonary Hypertension
07:41

Induction and Phenotyping of Acute Right Heart Failure in a Large Animal Model of Chronic Thromboembolic Pulmonary Hypertension

Published on: March 17, 2022

3.4K

Related Experiment Videos

Last Updated: Feb 1, 2026

Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine
10:08

Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine

Published on: February 17, 2018

14.0K
Implantation of Total Artificial Heart in Congenital Heart Disease
07:27

Implantation of Total Artificial Heart in Congenital Heart Disease

Published on: July 18, 2014

25.2K
Induction and Phenotyping of Acute Right Heart Failure in a Large Animal Model of Chronic Thromboembolic Pulmonary Hypertension
07:41

Induction and Phenotyping of Acute Right Heart Failure in a Large Animal Model of Chronic Thromboembolic Pulmonary Hypertension

Published on: March 17, 2022

3.4K

Area of Science:

  • Cardiology
  • Pharmacology
  • Toxicology

Background:

  • Marijuana is a widely used illicit substance with increasing potency.
  • Its use is linked to various adverse cardiovascular events.
  • Bradycardia has been reported as a potential effect.

Observation:

  • A 51-year-old female with no prior medical history presented with complete heart block.
  • The patient had a history of chronic marijuana use.
  • The condition necessitated the implantation of a permanent pacemaker.

Findings:

  • This case represents the first reported instance of complete heart block directly attributed to chronic marijuana use.
  • Advanced conduction system abnormalities are identified as a potential complication.

Implications:

  • Physicians should be aware of the risk of conduction abnormalities with chronic marijuana use.
  • Increased prevalence of medical marijuana may lead to more such cases.
  • This underscores the importance of thorough patient history regarding substance use.