Defibrillation Field: Understanding the 2D Current Flow Through the Thorax

What is Defibrillation?

Defibrillation is a medical procedure used to restore normal heart rhythm by delivering an electric shock to the heart. This process is crucial in treating cardiac arrhythmias, particularly ventricular fibrillation, which can be life-threatening.

The defibrillation field refers to the distribution of electrical current within the thorax during this procedure.

2D vs 3D Models

Traditional models of defibrillation use a three-dimensional approach, assuming uniform conductivity throughout the body. However, the 2D cross-section model focuses on a transverse slice through the thorax, simplifying the problem for analysis.

This 2D model treats the thoracic tissue as a resistive sheet, allowing for easier computation of current distribution and its effects.

Factors Affecting Current Flow

Electrode placement is critical in determining the efficiency of defibrillation. Anterolateral and anteroposterior placements can significantly affect how the current flows through the heart.

Other factors include the energy delivered, transthoracic impedance (the resistance between the electrodes), and the patient's chest size.

Importance of Defibrillation Field

Understanding the defibrillation field helps in optimizing electrode placement to ensure that the current reaches the myocardium effectively.

This knowledge is essential for improving the success rate of defibrillation and minimizing potential harm to surrounding tissues.

Frequently asked questions

Try it live

Everything above runs in your browser — open Defibrillation Field — 2D Cross-Section Simulator and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.