Heart rhythm : the official journal of the Heart Rhythm Society
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Multicenter Study
Dynamicity of hypothermia-induced J waves and the mechanism involved.
J waves develop during hypothermia, but the dynamicity of hypothermia-induced J waves is poorly understood. ⋯ J waves in severe hypothermia were augmented after short RR intervals in 7 patients as expected for depolarization abnormality, whereas 2 patients showed a bradycardia-dependent augmentation as expected for transient outward current-mediated J waves. Increased conduction delay at short RR intervals can be responsible for the accentuation of the transient outward current and J waves during severe hypothermia.