Related Experiment Video

Updated: Oct 6, 2025

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
10:17

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

Published on: April 11, 2025

1.0K

Finding type and location of the source of cardiac arrhythmias from the averaged flow velocity field using the

Qi-Hao Li1, Enid Van Nieuwenhuyse2, Yuan-Xun Xia1

  • 1Department of Physics, Zhejiang University, Hangzhou 310027, China.

Physical Review. E
|January 15, 2022
PubMed

Insights

This study introduces the averaged flow velocity-determinant trace (AFV-DT) method to pinpoint sources of cardiac arrhythmias. The novel technique accurately identifies arrhythmia types and locations, even with noisy, low-resolution data.

Area of Science:

  • Cardiovascular Science
  • Biophysics
  • Computational Biology

Background:

  • Life-threatening cardiac arrhythmias stem from abnormal electrical excitation wave propagation.
  • Identifying arrhythmia sources is difficult due to low spatial resolution and noise in electrode recordings.

Purpose of the Study:

  • To develop a novel method for accurately locating sources of cardiac arrhythmias.
  • To address the challenges posed by low spatial resolution and noise in clinical recordings.

Main Methods:

  • Development of the averaged flow velocity-determinant trace (AFV-DT) method.
  • Integration of optical flow analysis (averaged flow velocity) and dynamical systems vector field analysis (determinant-trace).
  • Testing on simulated cardiac tissue data (Luo-Rudy model) and clinical cases.

Main Results:

  • The AFV-DT method successfully identifies focal activity, spiral waves, and rotating waves around obstacles.
  • Effective performance demonstrated on low spatial resolution data (up to 8x8) and robustness against noise.
  • Accurate identification of arrhythmia type and location in two clinical cases.

Conclusions:

  • The AFV-DT method offers a promising solution for localizing arrhythmia sources.
  • The technique shows potential for improving diagnosis and treatment of cardiac arrhythmias.
  • Further development is planned to enhance the method's capabilities.

More Related Videos

In vitro Assessment of Aortic Regurgitation Using Four-Dimensional Flow Magnetic Resonance Imaging11:16

In vitro Assessment of Aortic Regurgitation Using Four-Dimensional Flow Magnetic Resonance Imaging

Published on: February 25, 2022

3.5K
Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery04:48

Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery

Published on: November 28, 2018

8.1K

Related Concept Videos

Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
135
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.
1.1K
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...
195
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...
1.5K