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

Dysrhythmias III: Characteristics of Dysrhythmias

Dysrhythmias III: Characteristics of Dysrhythmias

Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per minute.

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

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

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...

Disturbances in Heart Rhythm

Disturbances in Heart Rhythm

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...

Dysrhythmias II: Classification of Tachyarrhythmias

Dysrhythmias II: Classification of Tachyarrhythmias

Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...

Cardiovascular System Abnormal Findings II: Auscultation

Cardiovascular System Abnormal Findings II: Auscultation

Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
Abnormal Heart Sounds
Gallops:

You might also read

Related Articles

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

Sort by

Same author

Author Correction: Random access and semantic search in DNA data storage enabled by Cas9 and machine-guided design.

Nature communications·2026

Same author

Prevalence of frailty and its association with cognition in preclinical Alzheimer's disease: a cross-sectional analysis of baseline data from the A4 study.

Age and ageing·2026

Same author

Reconciling links between diversity and population stability across global plant communities.

The New phytologist·2026

Same author

Vicarious trauma primes innate immunity and reconfigures human brain networks.

bioRxiv : the preprint server for biology·2026

Same author

Safety and feasibility of a low-cost laparoscope in a porcine model.

Surgical endoscopy·2025

Same author

Site conditions but not intraspecific competition impact Eastern redcedar (Juniperus virginiana) sapling growth and physiology along a stress and latitude gradient.

Journal of plant research·2025

Same journal

Aortic Valve Replacement in Women of Reproductive Age.

Journal of the American College of Cardiology·2026

Same journal

Sudden Death in Cardio-Kidney-Metabolic Patients: Insights From FINE-HEART.

Journal of the American College of Cardiology·2026

Same journal

Ultra-Thin Sirolimus-Eluting Versus Everolimus-Eluting Stents in Diabetic Multivessel Coronary Artery Disease Patients: The TUXEDO-2 Trial.

Journal of the American College of Cardiology·2026

Same journal

Reframing Cardiometabolic Risk and Frailty Through Sarcopenic Obesity.

Journal of the American College of Cardiology·2026

Same journal

Imaging-Derived Sarcopenic Obesity and Cardiovascular Outcomes: Insights Into Heart Failure Risk and Muscle Biology.

Journal of the American College of Cardiology·2026

Same journal

The Measure of a Leader: Lessons in Leadership From Eugene Braunwald.

Journal of the American College of Cardiology·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 9, 2026

Transthoracic Echocardiographic Examination in the Rabbit Model

Transthoracic Echocardiographic Examination in the Rabbit Model

Published on: June 1, 2019

Left ventricular outflow tract ectopy: tiger territory

Malini Govindan¹, David Ward

¹St Georges Hospital, Cardiology, London, England.

Journal of the American College of Cardiology

|August 28, 2010

Summary

No abstract available in PubMed .

More Related Videos

Transthoracic Echocardiography to Assess Post-Resuscitation Left Ventricular Dysfunction After Acute Myocardial Infarction and Cardiac Arrest in Pigs

Transthoracic Echocardiography to Assess Post-Resuscitation Left Ventricular Dysfunction After Acute Myocardial Infarction and Cardiac Arrest in Pigs

Published on: July 12, 2022

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

Published on: January 31, 2019

Related Experiment Videos

Last Updated: Jun 9, 2026

Transthoracic Echocardiographic Examination in the Rabbit Model

Transthoracic Echocardiographic Examination in the Rabbit Model

Published on: June 1, 2019

Transthoracic Echocardiography to Assess Post-Resuscitation Left Ventricular Dysfunction After Acute Myocardial Infarction and Cardiac Arrest in Pigs

Transthoracic Echocardiography to Assess Post-Resuscitation Left Ventricular Dysfunction After Acute Myocardial Infarction and Cardiac Arrest in Pigs

Published on: July 12, 2022

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

Published on: January 31, 2019