Programmed Electrical Stimulation in Mice

Overview

This article presents a procedure for programmed electrical stimulation in mice, enabling the assessment of cardiac conduction properties and the induction of arrhythmias. The use of a transvenous catheter allows for intracardiac electrogram recordings to identify arrhythmogenic substrates.

Key Study Components

Area of Science

• Cardiac electrophysiology
• Arrhythmia research
• Mouse models

Background

• Programmed electrical stimulation is a technique used to evaluate heart conduction.
• It can help in understanding the mechanisms behind cardiac arrhythmias.
• Intracardiac electrogram recordings provide valuable data for research.
• This method is particularly useful in preclinical studies using mouse models.

Purpose of Study

• To demonstrate the procedure for programmed electrical stimulation in mice.
• To identify arrhythmogenic substrates through electrogram recordings.
• To enhance understanding of cardiac conduction properties.

Methods Used

• The anesthetized mouse is positioned on a heating board.
• The right jugular vein is accessed and prepared for catheter insertion.
• A 1.1 French OC Apolar catheter is inserted into the vein and advanced into the heart.
• Electrogram recordings are obtained following programmed electrical stimulation protocols.

Main Results

• Successful catheter placement in the right atrium and ventricle.
• Electrogram recordings reveal conduction properties of the heart.
• Arrhythmias can be induced and terminated using pacing protocols.
• Identification of arrhythmogenic substrates is achieved through this method.

Conclusions

• Programmed electrical stimulation is an effective method for studying cardiac function in mice.
• This technique aids in the understanding of arrhythmias and their underlying mechanisms.
• Future research can build on these findings to explore therapeutic interventions.

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