Get your health question answered instantly from our pool of 18000+ doctors from over 80 specialties
128 Doctors Online

By proceeding, I accept the Terms and Conditions

Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

HCM Blog Instant Access to Doctors
HCM BlogQuestions Answered
HCM Blog Satisfaction

Why Does The Blood Pressure Level Suddenly Drop?

Hi I had a ct scan today, and experienced dizziness, nausea, hot sweat, and vision disturbance, following the insertion of the canula, prior to any contrast being given. I suffered a type a aortic dissection in January and have an occluded right corotid artery and diminished blood flow to the right side of my brain. I did not experience any stroke symptoms today. What could have caused the sudden drop in bp? Of not heat pads were put on both my arms for about to assist in finding a vein - would this have contributed?
posted on Sun, 3 Aug 2014
Twitter Thu, 20 Aug 2015 Answered on
Twitter Fri, 21 Aug 2015 Last reviewed on
Report Abuse
Cardiologist,  's  Response
Hello. Thank you for your question and welcome to HCM. I understand your question.

This is a phenomenon called vagal syndrome. It tends to happen in frightening perceived procedures to the patients, and also from pressing of a neuro-vascular (nerve, artery, vein) area. It is caused by compensatory overstimulation of the parasympathetic (vagal) system and is characterized by: dropping in heart rate, blood pressure, nausea and vomiting, blurry vision, excessive sweating etc. There are cases that present without the bradicardia (dropping heart rate). Anyway, it is not an allergic reaction, and it is not at dangerous, if the proper treatment is immediately installed, with fluids and atropine.

I hope I was helpful. Take care.

Dr. Meriton
I find this answer helpful
Disclaimer: These answers are for your information only and not intended to replace your relationship with your treating physician.
This is a short, free answer. For a more detailed, immediate answer, try our premium service [Sample answer]
Share on
 

Related questions you may be interested in


Loading Online Doctors....
Why Does The Blood Pressure Level Suddenly Drop?

Hello. Thank you for your question and welcome to HCM. I understand your question. This is a phenomenon called vagal syndrome. It tends to happen in frightening perceived procedures to the patients, and also from pressing of a neuro-vascular (nerve, artery, vein) area. It is caused by compensatory overstimulation of the parasympathetic (vagal) system and is characterized by: dropping in heart rate, blood pressure, nausea and vomiting, blurry vision, excessive sweating etc. There are cases that present without the bradicardia (dropping heart rate). Anyway, it is not an allergic reaction, and it is not at dangerous, if the proper treatment is immediately installed, with fluids and atropine. I hope I was helpful. Take care. Dr. Meriton