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

357
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...
357
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

607
Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
607
Decreased pulse rate01:14

Decreased pulse rate

748
Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...
748
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

289
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...
289
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

362
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...
362
Cardiomyopathy VII: Pre and Post Operative Nursing Management01:28

Cardiomyopathy VII: Pre and Post Operative Nursing Management

170
Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...
170

You might also read

Related Articles

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

Sort by
Same author

Evidence-based fluid resuscitation of the septic HFpEF patient: A narrative review of the literature.

Journal of critical care medicine (Universitatea de Medicina si Farmacie din Targu-Mures)·2026
Same author

Anaphylactic shock following intravenous ranitidine in rural Nepal: a case report.

International journal of emergency medicine·2025
Same author

Grayanotoxin poisoning following fresh rhododendron flower ingestion: a rare case report from rural Nepal.

International journal of emergency medicine·2025
Same author

Flash and point-and-shoot hybrid lidar by DMD-based solid-state diffractive beam and image steering.

Optics express·2025
Same author

Mediastinal lymphangioma and intestinal lymphangiomatosis presenting with chylothorax: a systematic review of therapeutic modalities.

BMC pulmonary medicine·2025
Same author

A rare presentation of pulmonary transthyretin amyloidosis.

Respiratory medicine case reports·2025

Related Experiment Video

Updated: Dec 11, 2025

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
09:20

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice

Published on: July 5, 2021

3.4K

Postpartum Transient Hypervagotonic Sinus Node Dysfunction Leading to Sinus Bradycardia: A Case Report.

Roshan Acharya1,2, Rajesh Shrestha3

  • 1Internal Medicine, Cape Fear Valley Hospital, Fayetteville, USA.

Cureus
|August 21, 2020
PubMed
Summary

Sinus bradycardia, a slow heart rate, is common, but this case highlights transient symptomatic bradycardia in a young woman. This was due to postpartum hypervagotonic sinus node dysfunction (SND).

Keywords:
hypervagotonicincreased vagal tonepostpartum painsinus bradycardiasinus node dysfunction

More Related Videos

Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China
08:42

Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China

Published on: February 11, 2022

4.0K
Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
14:09

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Published on: March 21, 2013

21.5K

Related Experiment Videos

Last Updated: Dec 11, 2025

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
09:20

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice

Published on: July 5, 2021

3.4K
Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China
08:42

Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China

Published on: February 11, 2022

4.0K
Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
14:09

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Published on: March 21, 2013

21.5K

Area of Science:

  • Cardiology
  • Electrophysiology
  • Pediatric Cardiology

Background:

  • Sinus bradycardia (SB) is a prevalent condition, frequently observed in children, adults, and athletes, often asymptomatic.
  • It can manifest as a heart rate below 30 beats per minute, particularly during sleep.
  • Genetic factors, such as HCN4 mutations, and increased vagal tone can contribute to SB.

Observation:

  • This report details the first documented case of symptomatic bradycardia in a young Caucasian female.
  • The patient experienced transient symptomatic bradycardia, distinct from typical asymptomatic presentations.
  • The condition was linked to the postpartum period.

Findings:

  • The symptomatic bradycardia was attributed to hypervagotonic sinus node dysfunction (SND).
  • This case underscores that SND can present symptomatically, even in young, otherwise healthy individuals.
  • Postpartum physiological changes may precipitate or unmask underlying SND.

Implications:

  • Recognizing symptomatic SND is crucial for appropriate diagnosis and management.
  • This case broadens the understanding of SND presentation beyond asymptomatic or athlete-related bradycardia.
  • Further research into postpartum cardiovascular changes and their impact on cardiac autonomic function is warranted.