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Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
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Porcine Cardiac Arrest Model Using an Implantable Defibrillator.

Benjamin Stage Storm1, Knut Tore Lappegård2, Charlotte Björk Ingul3

  • 1Nord University; UiT The Arctic University of Norway; Nordland Hospital Trust; benjamin.s.storm@nord.no.

Journal of Visualized Experiments : Jove
|January 26, 2026
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Summary
This summary is machine-generated.

This study introduces a new porcine cardiac arrest model using an implantable cardioverter-defibrillator (ICD) for reliable ventricular fibrillation (VF) induction and resuscitation. This refined method improves data accuracy and reduces animal use in cardiac arrest research.

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Area of Science:

  • Cardiovascular Research
  • Translational Medicine
  • Animal Models

Background:

  • Large animal models are crucial for cardiac arrest research.
  • Conventional methods for ventricular fibrillation (VF) induction and defibrillation face challenges like motion artifacts and inconsistent success rates.
  • Existing techniques often lead to high animal resource utilization.

Purpose of the Study:

  • To develop a reproducible porcine cardiac arrest model for improved translational research.
  • To establish a reliable method for ventricular fibrillation (VF) induction and cardioversion using an implantable cardioverter-defibrillator (ICD).
  • To enable accurate intracardiac electrocardiogram (ECG) monitoring during resuscitation, adhering to the 3Rs principles (Replacement, Reduction, Refinement).

Main Methods:

  • Utilized an implantable cardioverter-defibrillator (ICD) for controlled induction and cardioversion of ventricular fibrillation (VF) in pigs.
  • Implemented repeated cycles of VF induction and cardioversion within the same animal.
  • Employed intracardiac ECG for continuous, artifact-resistant rhythm monitoring throughout resuscitation.

Main Results:

  • Achieved high success rates for both ventricular fibrillation (VF) induction and cardioversion.
  • Demonstrated reliable recovery of spontaneous circulation in eleven pigs.
  • Showcased improved artifact resistance compared to surface ECG monitoring.

Conclusions:

  • The ICD-based porcine model offers a standardized and reproducible approach to cardiac arrest research.
  • This method enhances experimental consistency and facilitates reproducible investigation of pathophysiology and resuscitation strategies.
  • The protocol effectively minimizes physiological stress and animal numbers, aligning with ethical research principles.