I don't agree with your reading or your method.My 140/90 blood pressure seems to have normalized after lots of sun exposure.
Last night: 120/79
After cannabis: 113/74
I took three readings each and averaged them.
If you release the pressure at 7 mm Hg per sec then:
If your heart rate is 60 bpm your BP can vary up to 7 mm Hg per reading.
Consecutive readings on the same arm are not reliable due to expansion of the arteries.
You will need to wait at least 5 minutes between readings.
Best practice is to round off. Thus 134/87 becomes 130/90.
