Key result
High-voltage transthoracic shocks in dogs demonstrated that only 4% of the total transthoracic current passes through the heart, with 82% shunted by the thoracic cage and 14% by the lungs.
Why the study?
What proportion of transthoracic current passes through the heart during defibrillation in dogs?
What proportion of transthoracic current passes through the heart during defibrillation in dogs?
During transthoracic defibrillation in dogs, only 4% of the delivered current actually passes through the heart, which is significantly lower than some previous estimates.
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Reduces estimated cardiac current fraction in canine defibrillation; challenges prior models and leaves open human translation.
Deale et al. (1990) studied Transthoracic defibrillation (n=32). High-voltage transthoracic shocks was evaluated on Transcardiac current fraction (FC). High-voltage transthoracic shocks in dogs demonstrated that only 4% of the total transthoracic current passes through the heart, with 82% shunted by the thoracic cage and 14% by the lungs.
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