I am 68 years i am puzzled by my blood pressure readings. my dystolic is very regular & low, 80% of the time between 67 and 72; but my systolic is all over the place, averaging at 132 but sometimes up to 160 sometimes down to 110. why?

Blood pressure will change moment to moment depending on your activity levels, hydration state, level of stress, time of day, state of arousal, and general health. The method used and the measuring device is critical for an accurate reading. A doppler electronic device attached to a large wide cuff on your upper arm is ideal. For medical purposes the lowest pressure of the day is all that matters.

Some questions 1. Is your device accurate on you? 2. Do you have the right sized cuff for your arm? 3. Do you sit in a straight backed chair with feet flat on the floor. No clothing below cuff. Rest 5 min then take it. 4. Do not take if you have smoked a cig/drank coffee wait 30 min. If you need to pee do so first 5. Is your BP the same in both arms? I not use highest one. 6. Take before meds.