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Updated: Jun 14, 2025
Ambulatory ECG Recording in Mice
Published on: May 27, 2010
Barium Chloride-Induced Cardiac Arrhythmia Mouse Model Exerts an Experimental Arrhythmia for Pharmacological
Mengting Zeng1, Liyue Huang1, Xiaohui Zheng1
1Functional Physiology Section, Department of Basic Medical Science, Xiamen Medical College, Xiamen 361023, China.
Aim:
Cardiac arrhythmias are among the most important pathologies that cause sudden death. The exploration of new therapeutic options against arrhythmias with low undesirable effects is of paramount importance.
Methods:
However, the convenient and typical animal model for screening the potential lead compound becomes a very critical modality, particularly in anti-arrhythmia. In this study, mice were intraperitoneally (i.p.) injected with BaCl2, CaCl2, and adrenaline to induce arrhythmia, and simultaneously compared with BaCl2-induced rats.
Results:
Electrocardiogram (ECG) showed that the majority of mice repeatedly developed ventricular bigeminy, ventricular tachycardia (VT), and ventricular fibrillation (VF) after BaCl2-injection as seen in rats. The ECG of mice developed ventricular bigeminy and VT after CaCl2 and AT after adrenaline i.p. injection. Additionally, acute cardiac arrhythmia after BaCl2 i.p. injection could be reverted by drugs (lidocaine and amiodarone) administration. Additionally, the different routes of administration for various chemical-induced arrhythmia in both mice and rats were also retrieved from PubMed and summarized. Comparing this approach with previous studies after the literature review reveals that arrhythmia of BaCl2-induced i.p. mice is compatible with the induction of other routes.
Conclusions:
This study brings an alternative experimental model to investigate antiarrhythmic theories and provides a promising approach to discovering new interventions for acute arrhythmias.
Insights
This study introduces a new mouse model for inducing cardiac arrhythmias using chemical injections, offering a viable alternative for testing anti-arrhythmic drugs. The model effectively mimics arrhythmias seen in rats and shows promise for discovering new treatments.
Area of Science:
- Cardiovascular Research
- Pharmacology
- Toxicology
Background:
- Cardiac arrhythmias are a significant cause of sudden death.
- Developing new anti-arrhythmic therapies with minimal side effects is crucial.
- Effective animal models are essential for screening potential anti-arrhythmic compounds.
Purpose of the Study:
- To establish and validate a novel mouse model for inducing cardiac arrhythmias.
- To compare the efficacy of different chemical inducers (BaCl2, CaCl2, adrenaline) in mice.
- To evaluate the potential of this model for anti-arrhythmic drug discovery.
Main Methods:
- Mice were intraperitoneally injected with BaCl2, CaCl2, or adrenaline to induce arrhythmias.
- Electrocardiograms (ECG) were used to monitor cardiac rhythm.
- The induced arrhythmias in mice were compared to BaCl2-induced arrhythmias in rats.
- Literature review was conducted to compare different administration routes for arrhythmia induction.
Main Results:
- BaCl2 injection in mice reliably induced ventricular bigeminy, ventricular tachycardia (VT), and ventricular fibrillation (VF), similar to rats.
- CaCl2 induced ventricular bigeminy and VT, while adrenaline induced atrial tachycardia (AT) in mice.
- Lidocaine and amiodarone successfully reverted BaCl2-induced acute cardiac arrhythmias in mice.
- The BaCl2-induced arrhythmia model in mice via intraperitoneal injection is comparable to other induction methods.
Conclusions:
- This study presents a valuable alternative experimental model for investigating anti-arrhythmic strategies.
- The validated mouse model offers a promising platform for the discovery of novel interventions for acute arrhythmias.
- The findings support the use of this model in preclinical anti-arrhythmic research.
