Related Experiment Video
Updated: Jun 3, 2025
08:10
Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
Published on: July 20, 2022
1.6K
Correlation Between Voltage and Impedance Mapping in Patients with Atrial Fibrillation.
Antonio Taormina1, Benedetta Grossi2, Elisa Maria Ragaini2
1Cardiac Arrhythmia Department, IRCCS Humanitas Research Hospital, Via Alessandro Manzoni, 6, 20089 Rozzano, Italy.
Journal of Clinical Medicine
|January 11, 2025
Summary
This study found a positive correlation between electrical impedance and voltage amplitude in atrial fibrillation ablation. This suggests impedance may help characterize the arrhythmogenic substrate during pulmonary vein isolation.
Area of Science:
- Electrophysiology
- Cardiology
- Medical Imaging
Background:
- Pulmonary vein isolation (PVI) is a key treatment for atrial fibrillation.
- Electrical impedance and voltage amplitude offer insights into tissue properties.
Purpose of the Study:
- To investigate the relationship between bipolar voltage, impedance, and left atrial wall thickness in atrial fibrillation ablation.
- To explore the potential of impedance as a tool for arrhythmogenic substrate characterization.
Main Methods:
- Prospective enrollment of patients undergoing paroxysmal (PAF) and persistent (PsAF) atrial fibrillation ablation.
- Preprocedural MDCT for left atrial wall thickness (LAWT) assessment.
- Acquisition of electroanatomic maps, collecting bipolar electrogram impedance (Ω) and voltage (mV) values.
Main Results:
- A positive correlation (rS = 0.4166, p < 0.001) was observed between bipolar voltage and impedance.
- PsAF patients exhibited lower mean impedance (129.1 ± 3.8 Ω) and voltage (<0.05 mV) compared to PAF patients.
- No significant correlation was found between voltage or impedance and LAWT.
Conclusions:
- A correlation exists between voltage amplitude and impedance values in atrial fibrillation ablation.
- Impedance may serve as a valuable parameter for characterizing the arrhythmogenic substrate.
- Further research could establish impedance as a complementary tool in PVI procedures.
Related Concept Videos
01:12Mesh Analysis for AC Circuits
336
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
336
01:24Bode Plots Construction
662
The Bode plot is an essential tool in control system analysis, mapping the frequency response of a system through a magnitude plot and a phase plot, both against a logarithmic frequency axis. To construct a Bode plot, consider the transfer function H(ω):
662
01:23Impedances and Admittance
551
In the realm of AC circuits, passive circuit elements like resistors, inductors, and capacitors take on a different character when characterized by phasor voltage and current. Their behavior is expressed through impedance, a vital concept in AC circuit analysis.
Impedance is a measure of resistance to sinusoidal current flow in an AC circuit. Unlike their behavior in DC circuits, where inductors appear as short circuits and capacitors as open circuits, the behavior of these components in AC...
Impedance is a measure of resistance to sinusoidal current flow in an AC circuit. Unlike their behavior in DC circuits, where inductors appear as short circuits and capacitors as open circuits, the behavior of these components in AC...
551
01:29RLC Series Circuits: Impedance
2.1K
When current flow is opposed in a DC or AC circuit, it is referred to as resistance or impedance, respectively. Impedance plays a key role in determining the performance of AC circuits. It is represented by Z, which is a combination of resistance and reactance, and depends upon the angular frequency, measured in ohms.
Thus, the magnitude of the impedance is given by the following equation,
Thus, the magnitude of the impedance is given by the following equation,
2.1K
01:25Correlation between ECG and Cardiac Cycle
3.4K
The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
3.4K
01:21Impedance Combination
310
Consider a string of christmas lights, each bulb symbolizing an impedance element. In this series configuration, the flow of electric current remains uniform across every component. This behavior aligns with Kirchhoff's Voltage Law (KVL), which asserts that the total impedance in such a setup equals the sum of individual impedances—akin to resistors in series. It follows that the voltage from the power source is distributed proportionally among these components, adhering to the...
310