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Nice. Many patients use this method to stop episodes of SVT (via vagal stimulation). Is there a limit for "how cold" for the water to be to trigger this reflex?
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To be honest, I don't know exactly the limit, but they mention that the colder the temperature of water the faster the triggering of the reflex after you submerge your face .. If I've to do it I'll make that the water is cold but not ice cold (uncomfortable and too much of any single variable can backfire).
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