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

Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

916
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...
916
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

3
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...
3
Electrocardiogram01:29

Electrocardiogram

2.2K
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...
2.2K
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

3
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...
3
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

544
An electrocardiogram (ECG)graphically represents the heart's electrical activity on ECG paper or a monitor.
Components of the Electrocardiogram
The primary components of a normal ECG waveform in Normal sinus rhythm(NSR) include the P wave, PR interval, QRS complex, ST segment, T wave, and occasionally a U wave.
ECG waveforms are divided by vertical and horizontal lines at standard intervals.
The horizontal axis measures time and rate, and the vertical axis measures amplitude or voltage....
544
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

542
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...
542

You might also read

Related Articles

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

Sort by
Same author

Delivery Routes and Anesthesia Affect Cord Blood NGF, BDNF, and Neonatal Outcomes.

Journal of clinical laboratory analysis·2026
Same author

Clinical Outcomes and Predictive Factors for Surgical Intervention in Fetal Ovarian Cysts: A Single-Center Retrospective Analysis.

Zeitschrift fur Geburtshilfe und Neonatologie·2026
Same author

Perinatal outcomes in severe preeclampsia with peritoneal ascites - a single tertiary center experience.

Ceska gynekologie·2026
Same author

Cesarean scar pregnancy as a precursor lesion for placenta accreta spectrum: evidence and implications.

The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians·2026
Same author

Clinical Outcomes of Twin Reversed Arterial Perfusion (TRAP) Sequence: A Retrospective Analysis From a Tertiary Center.

Congenital anomalies·2026
Same author

The Effect of Seizures on Perinatal Outcomes in Pregnant Women with Epilepsy: A Single Center Retrospective Study.

International journal of women's health·2025

Related Experiment Video

Updated: Jun 11, 2025

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
08:28

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

Published on: April 5, 2011

17.7K

Fragmented QRS in patients with preeclampsia.

Fikriye Karanfil Yaman1, Şükran Doğru2, Mustafa Karanfil3

  • 1Meram Faculty of Medicine, Clinic of Obstetrics and Gynecology Division of Maternal and Fetal Medicine, Necmettin Erbakan University (NEU), Konya, Turkey. fikriyekaranfilyaman@gmail.com.

Archives of Gynecology and Obstetrics
|October 5, 2024
PubMed
Summary

Fragmented QRS complexes (fQRS) are more common in women with preeclampsia, indicating potential cardiac electrical instability. This finding highlights fQRS as a marker for preeclampsia, suggesting links to electrolyte imbalances and hemodynamic stress.

Keywords:
ElectrocardiographyFragmented QRSHypertensive disorders of pregnancyPreeclampsiaRisk stratification

More Related Videos

Author Spotlight: Modeling an Aspect of Preeclampsia in Female Mice Using Hypoxic Human Placenta-Derived Small Extracellular Vesicles
05:31

Author Spotlight: Modeling an Aspect of Preeclampsia in Female Mice Using Hypoxic Human Placenta-Derived Small Extracellular Vesicles

Published on: January 26, 2024

769
Electrocardiogram Recordings in Anesthetized Mice using Lead II
04:16

Electrocardiogram Recordings in Anesthetized Mice using Lead II

Published on: June 20, 2020

12.7K

Related Experiment Videos

Last Updated: Jun 11, 2025

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
08:28

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

Published on: April 5, 2011

17.7K
Author Spotlight: Modeling an Aspect of Preeclampsia in Female Mice Using Hypoxic Human Placenta-Derived Small Extracellular Vesicles
05:31

Author Spotlight: Modeling an Aspect of Preeclampsia in Female Mice Using Hypoxic Human Placenta-Derived Small Extracellular Vesicles

Published on: January 26, 2024

769
Electrocardiogram Recordings in Anesthetized Mice using Lead II
04:16

Electrocardiogram Recordings in Anesthetized Mice using Lead II

Published on: June 20, 2020

12.7K

Area of Science:

  • Cardiology
  • Obstetrics
  • Internal Medicine

Background:

  • Preeclampsia (PE) is a serious hypertensive disorder of pregnancy.
  • Identifying cardiac involvement in PE is crucial for management.
  • Fragmented QRS complexes (fQRS) may indicate myocardial electrical abnormalities.

Purpose of the Study:

  • To determine the prevalence of fQRS in pregnant women with PE.
  • To explore clinical correlates and prognostic implications of fQRS in PE.
  • To assess the role of electrocardiographic markers in hypertensive disorders of pregnancy.

Main Methods:

  • A case-control study comparing 128 women with PE and 122 healthy controls.
  • 12-lead electrocardiography was used to assess fQRS and other cardiac parameters.
  • Clinical characteristics and laboratory findings were compared between groups.

Main Results:

  • fQRS was significantly more prevalent in women with PE (14.1%) compared to controls (3.3%).
  • fQRS and serum sodium (Na) levels were independently associated with PE after multivariable adjustment.
  • Elevated ALT levels were also observed in the PE group.

Conclusions:

  • Preeclampsia is associated with a higher prevalence of fragmented QRS complexes.
  • Electrolyte imbalances and hemodynamic stress may contribute to myocardial electrical instability in PE.
  • fQRS warrants further investigation for risk stratification in PE.