Hypercapnia?
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Primarily is an excited and or diving to 18m after a while or so can raise the heart beat as the system is not use to it. The pressure causes the heart rate to rise.
The pressure causes the heart rate to rise.
hi all
on my second dive since last year when i got to around 18 metres my heart started to thump really hard and i got a bit of a shock
i hadnt been swimming hard at the surface or anything so i wasnt out of breath,i just slowly moved away from the boat then settled my self and started the decent,,viz was 20 metres or so water is 26 degrees
could it just be the fact i was looking down over a drop off and i got a bit scared or is there anything up with my heart,,this didnt happen again in 2 more dives the day after
any ideas??
This might be way off base, but it is within the universe of possibilities.
My wife used to have occasional unexplained rapid heartbeat at depth, until we made the connection with her having drunk coffee earlier in the morning. She stopped drinking coffee on dive days and has had no problem since. A DAN lecturer later told me caffeine doesn't cause that, but in at least this one diver it did.
Just something else to consider.