Related Experiment Video

Updated: Jul 19, 2026

Generation of Local CA1 γ Oscillations by Tetanic Stimulation
08:02

Generation of Local CA1 γ Oscillations by Tetanic Stimulation

Published on: August 14, 2015

Bigeminal rhythms, common and uncommon mechanisms

Kyuhyun Wang1, Richard W Asinger, Henry J L Marriott

  • 1Department of Internal Medicine, Hennepin County Medical Center and University of Minnesota, Minneapolis, MN 55415, USA. kyuhyun.wang@co.hennepin.mn.us

Journal of Electrocardiology
|October 31, 2006
PubMed

Insights

Bigeminy, a common clinical arrhythmia, arises from various mechanisms. Understanding these diverse causes is key for accurate diagnosis and effective patient care.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Internal Medicine

Background:

  • Bigeminy is a frequently observed cardiac arrhythmia in clinical settings.
  • Understanding the underlying mechanisms of bigeminy is crucial for patient management.

Purpose of the Study:

  • To review the common and uncommon mechanisms causing bigeminy.
  • To illustrate typical examples with key electrocardiographic and clinical features.
  • To emphasize the importance of diagnostic awareness for quality patient care.

Main Methods:

  • Review of clinical literature and case examples.
  • Analysis of electrocardiographic patterns associated with bigeminy.
  • Correlation of clinical features with specific arrhythmogenic mechanisms.

Main Results:

  • Bigeminy can result from a wide spectrum of underlying causes, both frequent and rare.
  • Distinct electrocardiographic and clinical presentations are associated with different bigeminy mechanisms.
  • Illustrative examples highlight the diagnostic challenges and key differentiating features.

Conclusions:

  • A comprehensive understanding of bigeminy's diverse etiologies is essential for clinicians.
  • Accurate diagnosis, facilitated by recognizing varied mechanisms, is fundamental to optimal patient care.
  • Awareness of all possibilities aids in timely and correct identification of bigeminy causes.

More Related Videos

EEG Mu Rhythm in Typical and Atypical Development11:50

EEG Mu Rhythm in Typical and Atypical Development

Published on: April 9, 2014

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System10:17

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Published on: April 11, 2025

Related Concept Videos

Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
Disturbances in Heart Rhythm01:29

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 III: Characteristics of Dysrhythmias01:29

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.
Pulse rhythm01:30

Pulse rhythm

Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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...
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

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...