Yes you are correct, your blood supply does replenish quickly.
I normally do not get concerned when I see a blood pressure reading with a diastolic of 54 in a younger healthy man.
As long as you are not having symptoms of dizziness, chest pain or shortness of breath, your body is perfectly healthy and fine at this blood pressure (it can maintain normal blood flow to the brain, heart, lungs
at this pressure).
For someone who is 85 and has buildup in the arteries, he/she cannot adapt to changes in blood pressure well. In this case, fainting, heart attacks, strokes and/or heart failure can occur when blood pressure drops.
However, if you are experiencing significant dizziness with this lower diastolic blood pressure, then it is something to look into. I would not attribute it to the recent blood draw...it was too long ago. Dehydration, electrolyte imbalances, thyroid
illnesses (to name a few) could all be contributing causes.
Make sure you are getting extra fluids...
Feel free to ask any follow up questions you may have,
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