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Are variations in blood pressure readings in the same sitting normal?

Asked by sharpstick (532points) February 25th, 2011

I am taking my blood pressure regularly and have noticed that if I take multiple readings one after another I will get significantly different numbers. Example:

Left Arm
120/77
114/72
111/72

Is this is normal? Which numbers should I use?
Is the device I am using going bad?

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