>>141950http://files.dnr.state.mn.us/education_safety/safety/ice/hypothermia.pdf>Cold water shockcauses the victim to
involuntarily inhale water and drown.
It may also cause a sudden increase
in blood pressure and cardiac arrest
within three minutes of entering the
water.
>Swim failurecan happen from three
to 30 minutes of immersion. Cold
stiffens muscles making swimming to
stay afloat, zipping a life vest or re-
boarding a boat nearly impossible.
>Immersion hypothermia.After 30
minutes, body core temperature begins
to fall, which can lead to unconscious-
ness and eventually death.
>Post immersion collapsehappens during
or after rescue. As the body begins to
re-warm, cold blood that was trapped in
the extremities can rush to the heart,
possibly leading to heart failure. Also,
water that may have been inhaled can
damage the heart and lungs.
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