Yes, dehydration can lower blood pressure. That's one of the reasons that doctors sometimes prescribe diuretics along with blood pressure lowering meds.
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Thread: Blood Pressure...
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08-29-2013, 07:18 PM #1
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08-30-2013, 02:04 AM #2
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Yes, because I've experienced it myself.
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08-30-2013, 03:13 AM #3
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Yup, had some of these discussions with my docs.
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08-30-2013, 03:21 AM #4
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Dehydration reduces blood volume, so pressure follows. Don't even ask me how many times they had to stick me to find a vein to rehydrate me when I got dehydrated from not getting enough salt.....
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08-30-2013, 03:27 AM #5
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Very interesting! Oakleaf, I've had the same thing happen on days I've needed to get blood drawn but this is the first time I've seen it affect my blood pressure. Well, it makes sense as I had just left from my crazy group training to go to my Osteopath for yesterday's appointment.
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08-30-2013, 07:50 AM #6
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most definitely - we had a real hot spell around here a few summers ago and I took my blood pressure when I was pretty sure that I was quite dehydrated and it was something like 90/50.....
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09-11-2013, 01:24 PM #7
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I supported my randonneuring club's 600K this weekend. My volunteer position was at the overnight control. We sent a rider to the hospital in an ambulance after he passed out while sitting in a chair. Hit the deck HARD. He was admitted to the hospital and given FIVE liters of IV fluid. He peed out ~1.5 during that time frame, so he was easily 3 liters down. Dehydration --> low blood pressure --> blackout. Fortunately, he's OK now and was released after ~16 hours in the hospital.
I sometimes chuckle when I read articles about hyponatremia (basically, over-hydration leading to low blood sodium concentrations.) Yeah, it happens from time to time, I suppose, but FAR more endurance athletes suffer from DEhydration than anything else.
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