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Related Experiment Video

Updated: Jul 10, 2026

A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts

A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts

Published on: February 17, 2023

Successful defibrillation in water: a preliminary study.

J C Klock-Frézot¹, W J Ohley, R B Schock

¹Dept. of Electr. & Comput. Eng., Rhode Island Univ., Kingston, RI 02881, USA.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference

|October 20, 2007

Summary

This summary is machine-generated.

Mild hypothermia treatment is crucial after cardiac arrest. This study shows that defibrillation is safe and effective even when performed underwater using the Thermosuit cooling device.

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Standardized Model of Ventricular Fibrillation and Advanced Cardiac Life Support in Swine

Standardized Model of Ventricular Fibrillation and Advanced Cardiac Life Support in Swine

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Last Updated: Jul 10, 2026

A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts

A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts

Published on: February 17, 2023

A Rat Model of Ventricular Fibrillation and Resuscitation by Conventional Closed-chest Technique

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Published on: April 26, 2015

Standardized Model of Ventricular Fibrillation and Advanced Cardiac Life Support in Swine

Standardized Model of Ventricular Fibrillation and Advanced Cardiac Life Support in Swine

Published on: January 30, 2020

Area of Science:

Cardiovascular Research
Medical Device Technology
Emergency Medicine

Background:

Mild hypothermia (32-34°C) is a standard treatment to protect organs after cardiac arrest.
The Thermosuit is a novel device that applies a thin water layer for cooling.
Patients undergoing hypothermia may experience cardiac fibrillation, necessitating defibrillation.

Purpose of the Study:

To evaluate the safety and effectiveness of defibrillation administered in water.
To assess underwater defibrillation using the Thermosuit system.
To determine if water immersion affects defibrillation efficacy.

Main Methods:

A swine model (35 kg) was anesthetized and placed in the Thermosuit system.
Conventional AED electrodes were applied, and ventricular fibrillation was induced.
Defibrillation was attempted in dry, wet, and damp conditions within the Thermosuit, with water contaminated with saline.

Main Results:

Successful heart resuscitation was achieved in all fibrillation-defibrillation sequences.
Less than 220 joules were required for successful defibrillation.
Minimal differences in defibrillation voltage and current were observed across the tested conditions (dry, wet, damp).

Conclusions:

Underwater defibrillation is safe and effective.
The Thermosuit system allows for successful defibrillation during hypothermia treatment.
Clinical application of underwater defibrillation is feasible.