Doctor insights on:
How Low Can Blood Pressure Go Before It Is Dangerous
Blood pressure is a measurement of the force placed on the blood vessels and is comprised of the "systolic" pressure (the top number on a blood pressure meter) which is the peak pressure when the heart is pumping, and the "diastolic" pressure (the bottom number on a blood pressure meter) which is the pressure during the resting phase ...Read more
It's not the numbers: A normal BP is less than or equal to 135 on top and 85 on bottom. The lower, the better unless you're dizzy or passing out. Some very healthy people normally run a BP of 80-90 on the top number and that's fine. High bps increase long term risk. Very high bps (like >200/>110) that are also associated with symptoms like chest pain, breathlessness or confusion are considered an emergency. ...Read more
Depends: BP varies from person to person and even hour to hour. However if it drops too rapidly, it signals something being wrong with your cardiovascular system. When the pressure drops rapidly or gets low enough, there may not be enough blood going into the organs especially the brain. The end result may be fainting, shock, and even death. ...Read moreSee 1 more doctor answer
Depends: Low blood pressure is only dangerous if it is impairing adequate oxygen delivery to meet the needs of vital organs of the body, or if it signifies an underlying process that is dangerous if it worsens (e.g. Diffuse bacterial infection, or toxin poisoning). The actual number, in and of itself, is not dangerous if all organs remain working fine. ...Read moreSee 1 more doctor answer
It is relative: The most important factor to label somebody has low blood pressure is to know his baseline . If somebody is having blood pressure of say 80/50 mmhg for years and does not have any symptom at all . This should not be considered necessarily a bad idea . On the other hand if a person who had blood pressure of 140 /90 came to you with blood pressure of 80/60 , it should be cause for conmen. ...Read moreSee 2 more doctor answers
Depends.: Low pulse rate associated with symptoms or below 50 without meds probably requires some investigation. The degree of BP elevation determines how "dangerous" it is. In elderly patients it is often reasonable to accept higher baseline bp's rather than to push medications. If i can get a BP down to 140/90 range without side effects in an 80 year old I am generally pleased. ...Read more
Causes fainting: When your blood pressure is too low, you do not get enough oxygen to your brain and people feel lightheaded, dizzy or like they are going to faint. That is dangerous, but the most common cause of low blood pressure is not enough fluids or dehydration. If you are still having low blood pressure and feeling dizzy after drinking at least 64 oz per day, then you should see your doctor. ...Read more
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