Population
Nonischemic isolated feline hearts (n=14) and nonischemic isolated rabbit hearts (n=4)
Comparison
Sodium channel blockers: tetrodotoxin (5 x 10 M)… vs Nontreated hearts (baseline before application)
Design
Preclinical
Authors
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No immediate implications for clinical VF management; hypothesis-generating for sodium channel contributions to arrhythmia organization.
Sodium channel blockade in isolated hearts slows conduction time and increases arrhythmia organization, suggesting sodium channels actively maintain ventricular fibrillation.
Amitzur et al. (2000) studied this question.