A few questions on orthostatic hypotension:

Is it more a factor of the systolic pressure, the diastolic or a
combined low pressure both?

Is there a point at which one should seek medical attention for a low
reading on either one?

Any non-pharmaceutical causes to a drop in readings one day to the next?

(My readings today have been 110-130 over 62-68. A common number for me
is 115-ish over 75-ish. I've been noticing the
get-up-too-quick-head-rush on a number of occassions today. Pulse seems
my usual resting 52-65.)

It is defined by a 20 point drop in systolic {*filter*} pressure with
postural change from supine to standing upright.

When there are symptoms.

Dehydration would be one.  

You are not hypotensive according to the numbers you report.

Have a blessed New Years :-)

Humbly,

Andrew

--
Dr. Andrew B. Chung, MD/PhD
Board-Certified Cardiologist
http://www.***.com/