Mikie - Your normal pressure of 106/66 is fine. Your arteries just haven’t hardened as much as some of us other folks. Count your blessings.
Hypotension is when your normal systolic pressure is <90mm Hg and/or diastolic <60mm Hg and even then only if you experience adverse symptoms. (mrs levity often has a normal systolic pressure in the 90-100mm range)
The light headedness you experience on going from a near prone to standing position is known as
orthostatic hypotension, postural hypotension, or plain old "head rush". It's very common. I also get it when I'm tired.
Here’s some info from Wikipedia -
Orthostatic hypotension occurs when a person's
blood pressure falls when suddenly standing up from a
lying or sitting position.
[2] It is defined as a fall in systolic blood pressure of at least 20 mm Hg or diastolic blood pressure of at least 10 mm Hg when a person assumes a standing position. It occurs predominantly by delayed constriction of the lower body blood vessels, which is normally required to maintain an adequate blood pressure when changing position to standing. As a result, blood pools in the blood vessels of the legs for a longer period and less is returned to the heart, thereby leading to a reduced
cardiac output. Mild orthostatic hypotension is common and can occur briefly in anyone, although it is prevalent in particular among the elderly and those with known low blood pressure. Severe drops in blood pressure can lead to
fainting, with a possibility of injury.
There are numerous possible causes for orthostatic hypotension, such as certain medications (e.g.
alpha blockers),
autonomic neuropathy,
decreased blood volume, and age-related blood vessel stiffness.
…
Orthostatic hypotension is characterised by symptoms that occur after standing (from lying or sitting), particularly when this is done rapidly. Many report lightheadedness (a feeling that one might be about to faint), sometimes
severe. Generalized weakness or tiredness may also occur. Some also report difficulty concentrating,
blurred vision, tremulousness,
vertigo,
anxiety,
palpitations(awareness of the heartbeat), feeling sweaty or clammy, and sometimes
nausea. A person may look
pale.
[3]
….
Orthostatic hypotension is caused primarily by gravity-induced blood pooling in the lower extremities, which in turn compromises venous return, resulting in decreased
cardiac output and subsequent lowering of arterial pressure. For example, changing from a lying position to standing loses about 700
ml of blood from the
thorax, with a decrease in
systolic and
diastolic blood pressures.
[4] The overall effect is an insufficient blood perfusion in the upper part of the body.[
citation needed]
Still, the blood pressure does not normally fall very much, because it immediately triggers a
vasoconstriction (
baroreceptor reflex), pressing the blood up into the body again. (Often, this mechanism is exaggerated and is why
diastolic blood pressure is a bit higher when a person is standing up, compared to a person in the horizontal position.) Therefore, a secondary factor that causes a greater than normal fall in blood pressure is often required. Such factors include low blood volume, diseases, and medications.[
citation needed]
Tucker!
It’ll fill up again tho, it’s cyclical. 