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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Sudden Drop In Blood Pressure?

I have polycythemia Vera and I am getting phlebotomy to treat. During my last session the nurses kept having to flush the iv due to clotting in the tube. After about the 10th time I felt very nauseous and thought I might vomit. That s all I remember before waking up to nurses reclining my seat and asking me if I m OK. I had a BP of 45/15. I ve had dozens of phlebotomies before this one with no issues. What could have happened to cause such a drop in BP?
Tue, 9 Jul 2019
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Cardiologist 's  Response
Hello There

After going through your medical query I understand your concern and I would like to tell you that during phlebotomy sometime patient can experience hypotension but 45/15 can be a wrong reading as patient is not wake .at this low blood pressure. Take plenty of fluids

Hopefully this information will guide you properly.

Kind Regards
Dr Bhanu Partap
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Cardiologist Dr. Ilir Sharka's  Response
Hello,

I would explain that your symptoms are related to a vaso-vagal syncope, probably caused by the irritation of the vagal nerve during the manipulation on your veins.

This is quite a normal and physiological reaction and does not mean anything serious.

Hope I have answered your query. Let me know if I can assist you further.

Regards,
Dr. Ilir Sharka, Cardiologist
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What Causes Sudden Drop In Blood Pressure?

Hello There After going through your medical query I understand your concern and I would like to tell you that during phlebotomy sometime patient can experience hypotension but 45/15 can be a wrong reading as patient is not wake .at this low blood pressure. Take plenty of fluids Hopefully this information will guide you properly. Kind Regards Dr Bhanu Partap