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

Cardiomyopathy II: Dilated Cardiomyopathy

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...

Mitral Regurgitation II: Clinical Features and Diagnostic Tests

Mitral Regurgitation II: Clinical Features and Diagnostic Tests

Mitral regurgitation (MR) is a valvular heart disorder in which the mitral valve fails to close tightly, allowing blood to leak backward into the heart. Understanding the clinical manifestations, assessment, diagnostic findings, and medical management of MR is crucial to effectively managing affected patients.Clinical Manifestations of Mitral RegurgitationMitral regurgitation can be acute or chronic, each presenting differently and requiring different approaches:1. Acute Mitral...

Dysrhythmias IV: Characteristics of Bradyarrhythmias

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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...

Mitral Stenosis II: Clinical features and Diagnostic Tests

Mitral Stenosis II: Clinical features and Diagnostic Tests

Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...

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:

Heart Failure IV: Classification and Diagnostic Evaluation

Heart Failure IV: Classification and Diagnostic Evaluation

Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...

You might also read

Related Articles

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

Sort by

Same author

Long-Term Obesity Trends in Northern Sweden: Cross-Sectional Data From the MONICA Study (1986-2022).

Obesity science & practice·2026

Same author

Cholecystectomy vs Endoscopic Retrograde Cholangiopancreatography or No Intervention After Gallstone-Related Acute Pancreatitis.

JAMA surgery·2026

Same author

Associations between snus use and concentrations of CRP, 25(OH)D and testosterone: a population-based study.

Scandinavian journal of clinical and laboratory investigation·2026

Same author

Acute pancreatitis in relation to SARS-CoV-2 vaccination and infection: A nationwide cohort study in Sweden.

Pancreatology : official journal of the International Association of Pancreatology (IAP) ... [et al.]·2026

Same author

Coronary Computed Tomography Angiography in Prediction of First Coronary Events.

JAMA·2025

Same author

Association of height, BMI, and smoking status with prostate cancer risk before and after the introduction of PSA testing in Sweden.

Scientific reports·2025

Search research articles

Related Experiment Video

Updated: Aug 29, 2025

Biventricular Assessment of Cardiac Function and Pressure-Volume Loops by Closed-Chest Catheterization in Mice

Biventricular Assessment of Cardiac Function and Pressure-Volume Loops by Closed-Chest Catheterization in Mice

Published on: June 15, 2020

[Dual ventricular response - a rare and underdiagnosed condition?]

Slawomir Liszewski¹, Viktor Oskarsson²

¹överläkare, medicin- och rehabiliteringskliniken, Piteå sjukhus.

Lakartidningen

|September 9, 2022

Summary

Dual ventricular response, a rare heart rhythm condition, involves one P wave followed by two QRS complexes. This case report highlights its potential underdiagnosis due to mimicking other arrhythmias.

More Related Videos

Insertion, Maintenance, and Removal of the Percutaneous Dual Lumen Cannula Right Ventricular Assist Device

Insertion, Maintenance, and Removal of the Percutaneous Dual Lumen Cannula Right Ventricular Assist Device

Published on: July 20, 2022

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation

Published on: February 28, 2012

Related Experiment Videos

Last Updated: Aug 29, 2025

Biventricular Assessment of Cardiac Function and Pressure-Volume Loops by Closed-Chest Catheterization in Mice

Biventricular Assessment of Cardiac Function and Pressure-Volume Loops by Closed-Chest Catheterization in Mice

Published on: June 15, 2020

Insertion, Maintenance, and Removal of the Percutaneous Dual Lumen Cannula Right Ventricular Assist Device

Insertion, Maintenance, and Removal of the Percutaneous Dual Lumen Cannula Right Ventricular Assist Device

Published on: July 20, 2022

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation

Published on: February 28, 2012

Area of Science:

Cardiology
Electrophysiology
Cardiac Arrhythmias

Background:

Dual atrioventricular (AV) nodal non-re-entrant tachycardia, or dual ventricular response, is a rare condition.
It is characterized by 1:2 anterograde conduction through dual AV nodal pathways.
The primary symptom is palpitations, and treatment involves catheter ablation.

Observation:

This case report details two patients diagnosed with dual ventricular response over a decade at a Swedish hospital.
Diagnosis was based on electrocardiogram (ECG) findings indicative of dual ventricular response.
The patients presented with symptoms of palpitations.

Findings:

The study identified two cases of dual ventricular response, a condition with fewer than 100 reported instances globally.
ECG findings confirmed the characteristic 1:2 conduction pattern (one P wave to two QRS complexes).
The rarity and presentation of dual ventricular response were observed.

Implications:

Dual ventricular response may be underdiagnosed due to its resemblance to more common arrhythmias like supraventricular tachycardia and atrial fibrillation.
Increased awareness and recognition of ECG findings are crucial for accurate diagnosis.
This case report emphasizes the importance of considering rare conditions in differential diagnosis.